34 PALEOENVIRONMENT. THE STONE AGE D. Nadel Zinman Institute of Archaeology, Haifa University, Haifa, 31905, Israel E-mil: [email protected] THE OHALO II BRUSH HUTS AND THE DWELLING STRUCTURES OF THE NATUFIAN AND PPNA SITES IN THE JORDAN VALLEY Introduction defined structures (as opposed to rare earlier partial stone lines or "walls") reported from the Near East; (2) these sites were the first in the area to be rich in terms of ornamentation, decorations and "art" objects; (3) the core-area Natufian sites were the earliest to provide large numbers of well-preserved human skeletons; and (4) the Natufian was the immediate precursor of the Neolithic culture and, as such, was the focus of studies concerned with the origins of sedentism and agriculture. The earliest Neolithic phase (locally termed PrePottery Neolithic A, hence PPNA; 10,300 – 9,300 BP) is characterized by small and large villages subsisting on a mixed economy of agriculture and hunting-gathering, with a sophisticated social organization – both on the village level and the regional level (see (Bar-Yosef, 1989, 1991, 1998b; Kuijt, 2000) and references therein). Site structure and dwelling characteristics are well documented for the PPNA and Natufian sites, but are hardly evident in earlier contexts. Indeed, there are several reports on Upper Paleolithic and Early Epipaleolithic sites with isolated examples of partially preserved stone walls with an undefined contour. These provide very scarce direct evidence for the size, shape, and function of dwellings, as usually there are no floors, nor associated indoor installations. Examples of pre-Natufian stone alignments or walls include the Upper Paleolithic caves of Hayonim (Belfer-Cohen, Bar-Yosef, 1981: 21 – 23) and Sefunim (Ronen, 1984), and Early Epipaleolithic open-air sites such as Ein Gev I with six successive layers of what appears to have been a partially preserved cabin (Fig. 1) (Bar-Yosef, 1978). Though many tens of pre-Natufian sites have been excavated so far, the number and quality of preserved structures (or at least walls) is extremely low. The Epipaleolithic – Early Neolithic sequence of the Mediterranean Levant is archaeologically welldocumented and serves as one of the most detailed examples of the transition from a social organization based on a nomadic hunting-gathering way of life to sedentism and agriculture (Bar-Yosef, Belfer-Cohen, 1989; Henry, 1989). The Levantine Epipaleolithic (ca 20,000 – 10,300 BP, all dates uncalibrated; see (Bar-Yosef, Vogel, 1987; Goring-Morris, 1995)) lasted from the Last Glacial Maximum to the Pleistocene – Holocene transition. During most of this period of rapid cultural change, the rich and varied Mediterranean landscape was inhabited by small bands moving seasonally, while subsisting on the hunting and gathering of a wide range of species. According to material remains retrieved from numerous sites, they have been grouped into the Masraqan, Kebaran, and Geometric Kebaran complexes (see recent summary and discussion in (Goring-Morris, 1995; Goring-Morris, Belfer-Cohen, 1998) and references therein). However, the last phase of the Epipaleolithic was very different. A new and distinct archaeological entity evolved in the Mediterranean core area, the Natufian (12,500 – 10,300 BP) (Bar-Yosef, 1983, 1998a; BelferCohen, 1991, 1995; Byrd, 1989; Garrod, 1957; Garrod, Bate, 1937; Henry, 1989; Perrot, 1966; Perrot, Ladiray, 1988; Valla, 1995). This well studied culture drew enormous attention from both scholars and laymen, due to four major factors: (1) in various sites, stone-lined structures were discovered, being the oldest clearly Archaeology, Ethnology & Anthropology of Eurasia 1 (13) 2003 © 2003, D. Nadel 34 E-mail: [email protected] 35 It is interesting to note that at contemporaneous sites in East Europe and on the Russian plains, the picture is different. There, dozens of dwellings constructed of large mammoth bones were well preserved at several sites (see examples in (Pidoplichko, 1998; Soffer, 1985; Soffer, Praslov, 1993)). At the same time, in Western Europe, even in well-preserved sites (e.g., Pincevent (Leroi-Gourhan, Brezillon, 1966, 1972)), there are usually no walls surrounding in situ floors. There are, however, several sites in France where stone-paved areas have been preserved and interpreted as floors or bases of dwellings (e.g., Guillassou and Le Cerisier, see (Gaussen, 1980)). There are cases where pebbles delineating a rectangle 3 – 4 m long were also preserved, again probably representing the remains of a dwelling (Gaussen, 1980, 1994). It appears that in some areas, dwellings were constructed of perishable materials and thus not preserved. Indeed, against the poverty of pre-Natufian structural evidence, the Ohalo II remains (see Fig. 1) stand out as an example of a camp where dwellings built of perishable materials were well preserved. It is the aim of this paper to show that the current state of knowledge is the outcome of poor conditions for preservation and does not imply that the pre-Natufian period was a period without any forms of construction. Furthermore, the new finds, radiometrically dated to 19,500 BP (ca 23,000 BP, calibrated), enable a re-evaluation of the origins of the Natufian site structure and dwelling organization in the camp. Indeed, a diachronic study of continuity and change through 10,000 years can now be based on a larger sample of the earlier phase. This paper shows new details of the Ohalo II dwellings, and follows the development and continuity of certain characteristics as expressed in the proceeding Natufian sites and early Neolithic villages in the southern Levant (with an emphasis on the Jordan Valley). As this time span saw a dramatic shift in subsistence (from hunting-gathering to agriculture) and the development of complex sedentary societies, the kind of correlation between the two processes and the evolution, if at all, of the basic unit of dwelling is expected to shed more light on the daily organization of camp/village life and social structures of the local communities. A comparative study with an emphasis on Natufian and especially Neolithic residential change was recently presented (Byrd, 2000). However, the issue of pre-Natufian to Natufian development was so far only partially known (due to the small size of relevant pre-Natufian cases), and will be elaborated here. The Ohalo II structures The site The submerged site of Ohalo II is located in the Dead Sea Rift, on the shore of the current Sea of Galilee, and 0 50 km Fig. 1. Location map of Early Epipaleolithic (Ohalo II, Ein Gev), Natufian (Eynan, Wadi el Hammeh 27), and PPNA (Jericho, Netiv Hagdud) sites in the Jordan Valley with dwelling remains discussed in the text. in situ on the Lisan marls (the precursor of the current lake) at 212 – 213 m below msl (Belitzky, Nadel, in press; Nadel, 2002a). The camp covers an area of more than 2000 sq. m, and the excavated remains include six brush huts, six concentrations of fireplaces, a human grave, a pit, a stone installation, and midden deposits (Fig. 2) (Nadel, 1996; Nadel, Hershkovitz, 1991; Nadel et al., 1994). Submerged under anaerobic conditions, the organic remains were excellently preserved. Accordingly, the bases of brush walls (Nadel, Werker, 1999), as well as burnt wood and large quantities of charred seeds and fruit (Kislev, Nadel, Carmi, 1992) were preserved. On each floor, and around most hearths, large quantities of flint artifacts, animal bones, and plant remains were found, in many cases in what apparently resemble original distribution patterns. Large samples of charcoal from most loci provided thirty-three 14C dates, with an average of ca 19,500 BP (Nadel, Carmi, Segal, 1995; Nadel et al., 2001; Nadel et al., in press). The structures The brush hut remains are the oldest of their kind ever reported (Nadel, Werker, 1999). So far, the remains 36 0 5m Fig. 3. Detailed plans of six Ohalo II structures. Table. Area of Ohalo II hut floors (rounded to sq. m) Fig. 2. Plan of Ohalo II site (central area of excavation). of brush huts 1, 2, 3 and 13 were fully excavated (Fig. 3). That is, all sediment found within the wall contours (on the floors and above them) was excavated and wet-sieved and large samples of the material remains were already studied. In all cases, sections through and under the floors showed that there were no deeper archaeological layers under the observed floors (some sections were 0.8 m deep). In addition, more than half of hut 12 was excavated and hut 15 was tested across the center and at the northern edge. The full contour of five huts was recorded by following a dark line of burnt wood and other plant remains, as well as by documenting the limit of the dark inner sediment, which was always different from the natural clays and sand. Also, the shape and dimensions of hut 15 were tentatively reconstructed according to sections through the floor remains and by similarity to the other huts. All huts are more-or-less oval, and in the five fully observable cases the long axis lies in a north to south direction. In two cases the entrance was clearly located in the middle of the long eastern wall (huts 1(floor II) and 2). The larger huts are 4 – 4.5 m long (huts 1, 3, 12), while huts 2 and 13 are 2.5 – 3 m long. The area of the hut floors varies, and the five examples show a range between ca 5 and 13 sq. m (Table). The two larger ones (huts 1 and 3) are relatively similar, and are double the size of hut 13. The sample is statistically small, but there appears to be a range of dimensions, rather than clusters of "small" and "large." All hut floors have a bowl-like section, with the floor always lower than the surrounding surface (Fig. 4, 5). This was achieved by digging a shallow oval depression into the soft bedrock. In the middle, the depression was 20 – 30 cm lower than the surface. Then, a brush wall was built around the depression. It was constructed of thick branches of local trees such as tamarisk (Tamarix), willow (Salix), and oak (Quercus), forming the skeleton of the structure. Smaller leaf-bearing branches and grasses were placed on top, again using local species. No postholes were detected in or around any of the excavated huts. Such a simple building technique did not require heavy logs for a central support, and the huts could have been constructed during any season. None of the huts had a stone pavement, nor a continuous stone-lined wall. It should be stressed that this is the case for all, regardless of size or floor thickness. However, hut 12 was different in terms of stone use. Here, in all parts where the floor bottom was reached, isolated stones were found under it. They were usually at least 20 – 40 cm apart, never forming a continuous area, nor a continuous line. Nonetheless, it is possible that the stones were deliberately placed where 37 Fig. 4. Hut 1 during the excavation of floor II, facing east. 0 Fig. 5. A section through the bottom part of hut 2 floor. 1m Fig. 6. The stones outside the northwestern wall of hut 12. The dark material is the bottom part of the floor, with a large flat stone embedded inside (upper part of photo). Groups of two or three stones were set just outside the hut in the sandy clay, and many of them are erect. Fig. 7. An elongated stone placed erect through the sandy clay just outside the wall of hut 12. found, at the contact plain between the floor and the underlying Lisan. This is supported by two observations: (1) the lacustrine bedrock layers are devoid of stones in all excavated loci, sections, and tractor deep trenches (the latter totaling more than 100 m in length); (2) some of the stones were placed erect, on their narrow end. Furthermore, pebbles and stones (mostly 10 – 20 cm long) formed a loose arch along the northwestern edge of the hut (Fig. 6). Most of them were placed in groups of two or three stones, 20 – 50 cm apart. The majority are basalt stones, and many are erect (Fig. 7). Interestingly, broken worked stone implements are also incorporated in this line. The dark floor sediment does not reach these stones (except for one group). It should therefore be concluded that the stones were intentionally placed around the outer perimeter of the hut, maybe to support thick diagonal wall stakes. As there were no dislocated stones of similar size along this line, it is believed that this was not a stone wall (with some stones missing or scattered), but rather an outer support of some kind. The thickness of the cultural layer within each hut was usually 10 – 20 cm in the center, becoming thinner towards the walls. The layer was always dark, in shades of black, brown and gray, with high densities of charcoal and organic remains. In some places, there were lenses of lighter sands or ashes (for sedimentological and thin section details see (Tsatskin, 2002; Nadel et al., in press)). In all sections, the lower limit of the archaeological layer was clearly distinguished from the underlying light-colored marls, clays, and sands. In five huts, there were no visible layers within the fill running from side to side, though local lenses and "sub-layers" were observed. Thus, it is suggested that 38 à b c Fig. 8. A flat basalt stone on the floor II of hut 1 (a); a flat basalt stone on the floor of hut 12 (b) and its flat bottom side (c). the accumulation of debris corresponds to one floor. However, in hut 1 the situation was different. Here it was possible to distinguish three successive floors. The upper (I) was only partially preserved in the southern half of the hut. The middle (II) was well preserved and fully excavated in 1991. It was separated from the upper and lower floors by layers of silt and sand, in most places 3 – 5 cm thick. This floor had a high density of finds, including horizontally deposited specimens such as flint artifacts, bones, and a gazelle horn core. Furthermore, a large flat basalt stone was set horizontally on this floor. It was placed on a lens of yellow sand brought into the hut, material not found elsewhere on the floors (Fig. 8, a). Several small pebbles were set in the sand to secure the stone in a firm manner. Distribution studies of flints and fish vertebrae on this floor show non-random patterns (see below). The bottom floor (III) was exposed in 2000, and was shown to be larger than the middle one. It, too, was rich in flint, bones, and charred remains (as yet unstudied) and had a unique arrangement of small stones at the lowest level near the northeastern edge. Floor III was almost a circle, while floor II was smaller – with an oval shape and a distinct entrance from the east. Thus, there were three successive phases of occupation in the same shallow depression. It is possible that during the lower phase there was an accumulation of debris near the entrance. Then, the second floor was established on a smaller area, leaving this accumulation outside. This succession of floors is important in understanding past settlement patterns in terms of site use, repeated occupations, and length of stay. In-door installations Inner (within-hut) installations are not common. In none of the huts was a stone-lined hearth, nor a clearly defined hearth preserved, though stains of ashes and charcoal were present everywhere, as the huts had been burned. However, there was a round white ashy deposit on the bottom floor of hut 1 (ca 1 m across). As the hut floors and outdoor hearths are well preserved, it is suggested that indoor hearths were very uncommon in this camp. Big stones were found in several cases. Three erect stones (25 – 35 cm high) were still in situ when hut 2 was discovered (Fig. 9). Two of them were placed in the hut, and not along the wall. One similar stone was found just outside the northeastern corner of hut 3 (see Fig. 9, 10), and another near the same corner of hut 12. Both were set diagonally into the ground, with their bottom part dipping towards the hut. Hut 1 was again unique in this sense, as two large basalt stones were found on floor II. The first (mentioned above, ca 40 cm long) could have been used as an anvil or a working surface, though no correlated distribution of flints or bones was observed. The second was a large angular stone, ca 50 cm long. It was found at a point where the wall line surrounding the hut disappears (see Fig. 4). It looks as if the entrance was 39 here, and it is possible that the stone was placed to support an entrance frame. A flat basalt stone 40 cm long was found in hut 12 (see Fig. 6, 8, b, c). In size and flatness it resembles the "anvil" from hut 1. However, this stone was found inclining at the very edge of the basin-like floor, and the bottom side is much more regular and flat than the upper one. In both huts, the flat stone was at the northern side. The last relevant observation concerns small stones found erect under some floors. The largest number (six) comes from hut 3 (Fig. 11, a), though some were found elsewhere, including two small ones under floor III of hut 1 (Fig. 11, b). In all cases, the stones were 6 – 20 cm high and mostly made of basalt. They were standing erect below the floor, so that only the very top was sticking above the floor, if at all. Due to their small size and location, it is hard to reconstruct their function. Two tentative interpretations are suggested. The first would view them as supports for small above-floor wooden installations, of which nothing else was preserved. The second would draw from the sphere of symbolic behavior. Accordingly, the position of stones represented some aspects of social behavior, for example, ownership, which may have caused certain implements to be placed in an elaborate way under, or through the floor. Interestingly, a flat stone was set erect near a stone circle adjacent to the only grave found. Here too, the position of the stone could have had a symbolic meaning as part of the grave complex (Nadel, 1994; 2002b; in press). In-door activities The recovered finds directly reflect several indoor activities, and indirectly hint at some others. The flint assemblages from all huts represent knapping activities. There are cores, primary elements, core trimming elements, bladelets, as well as tiny debris on all floors (Nadel, 1999, 2001a). Thus, all huts were used for core reduction, and the wealth of bladelets and retouched pieces attest to indoor flint working as well as use or storage of retouched implements. There are also several examples of flint piles or caches on the floors. In addition, there are con-joinable pieces. Interestingly, there are fire-cracked con-joinable pieces as well. They reflect the shattering of the flint on the floor during the burning of the hut. The overall conclusion is toward indoor flint knapping, though this is not common in ethnographic cases. In hut 1 (floor II), the concentration of flint cores, debitage and debris shows that flint knapping took place near the entrance, probably by two or three individuals (Nadel, 2001a). On the same floor, the distribution of bones was different. Particularly illuminating are the fish vertebrae, concentrated in distinct piles (Nadel et al., 1994). It was suggested that fish were kept in the hut in baskets of some kind, probably hanging from the walls. When the hut was burned, everything fell on the floor, including the stored fish. The presence of small cord fragments on the same floor strengthens this claim. It should be noted that large quantities of a variety of mammal bones were recovered from each floor. Especially common were gazelle bones, followed by fallow deer and, to a much lesser extent, by fox and hare bones (Rabinovich, 1998). These probably reflect food consumption and may even be some sort of storage. Bird bones of over 60 species are present, indicating consumption as well as the use of feathers (Simmons, Nadel, 1998; Simmons, 2002). Interestingly, remains of small rodents were also found, mostly within hut 1 (Belmaker, Nadel, Tchernov, 2001). A completely different phenomenon relates to two examples of stone bowl fragments. One was found on the floor of hut 3 and one on the floor of hut 13. Each was found face down, with no other bowl fragments anywhere on the floor (Fig. 12). Also, each had a dense series of incisions on the inner face. It is tentatively suggested that they were part of symbolic behavior where chosen objects were placed on, or under, the floors (see (Nadel, 2002b; in press)). All the Ohalo II floors are similar in that they reflect a continuous accumulation of debris within the structure. There is no size sorting within this material, and it includes minute and large flint artifacts, animal bones, and stone implements (mostly basalt). At least some were found as in situ concentrations or piles, others in patterned distributions, and there are con-joinable pieces. One can conclude that (1) there was a continuous and relatively long period of material accumulation; (2) a variety of activities took place in each hut; (3) floor cleaning was not frequent, if it occured at all; and (4) at abandonment, many things were left as they had been. Additional aspects of the activities and the intervals of abandonment are expected to be better understood when the botanical studies are completed. It should be stressed that the combined results of botanical (Kislev, Nadel, Carmi, 1992; Kislev, Simchoni, Weiss, 2002)*, faunal (Lieberman, 1993; Rabinovich, 2002), and bird remains (Simmons, Nadel, 1998; Simmons, 2002) studies, as well as field and laboratory observations, strongly suggest a year-round use of the camp in general and certain huts in particular. The Natufian structures Natufian architecture is widely documented, and since site reports and many syntheses are available (see, e.g., * See also: Simchoni O. Reconstruction of the Landscape and Human Economy 19,000 BP in the Upper Jordan Valley by the Botanical Remains Found at Ohalo II. PhD Dissertation. Ramat Gan: Bar-Ilan Univ. (Hebrew), 1997 (unpublished). 40 Fig. 9. Hut 2 before excavations, facing north. Fig. 10. Close-up view of an erect large stone just outside hut 3, placed in a sandy clay layer. à b Fig. 11. Close-up view of erect stones under the floor of hut 3, placed in a sandy clay layer (a) and close-up view of two small erect stones on the bottom of floor III of hut 1 (b). à b Fig. 12. A partial view of the floor of hut 13 with the bowl fragment found up-side-down near a limestone pebble (a) and the bowl fragment after cleaning (b). (Byrd, 2000; Goring-Morris, 1996) and references therein), only a brief summary with an emphasis on certain aspects is presented here. In addition, some of the unique structures are not directly dealt with here, as they do not appear to represent typical dwellings. For example, structure 1 from Eynan is more elaborate (and different) than other local structures using the combination of large flat stones as pavement 41 and lime mortar around the wall, as well as having a number of sub-floor burials. Indeed, this unique and complex combination lead Perrot to provide several interpretations (Perrot, 1966; Perrot, Ladiray, 1988). The Natufian structures were discovered with a wall base made of undressed stones. Stone walls are usually well preserved, and they are viewed as direct evidence for the size and shape of structures. Three shapes are documented, namely oval, round and U-like (open oval or open circle). At Eynan, all shapes are present, and the U-wall of structure 131 is interpreted as a widely open hut (Valla, 1988, 1991). It is less likely that in this and similar cases, the original shape was oval, and only later disturbances deleted some of the walls, or that through continuous on-site construction, some of the stones were reused and thus complete walls were not always preserved. The size of Natufian structures varied considerably, especially through time. It has been shown that large structures with an effective floor area of 20 sq. m, or more, are common in the early Natufian sites (Eynan, Wadi el Hammeh 27, el-Wad B2). They are absent in the late Natufian, where most structures have an area of 5 – 10 sq. m (for the last phase at Eynan see (Valla et al., 2001; Goring-Morris, 1996: fig. 3)). The Hayonim Cave structures (built in the cave) are an extreme example of small structures. They could have been used for several purposes such as production or storage locations, rather than dwellings (Bar-Yosef, Goren, 1973; Belfer-Cohen, 1988). One of the most common features of Natufian structures is the floor level, always lower than the surrounding ground surface. Inner (within-structure) installations are common, especially stone built hearths. At Eynan, most excavated structures had an inner hearth, fully or partially surrounded by stones (Perrot, 1966; Valla, Lechevallier, 1989; Valla et al., 2001). Installations within structures were reported from various sites. For example, large rectangular stone built features were exposed in Wadi el Hammeh 27, some looking like benches (Edwards, 1991). The repeated use of structures, as evidenced by successive floors, has been documented in various sites for several huts, i.e., 131 at Eynan (Perrot, Ladiray 1988; Valla, 1988) and the Wadi el Hammeh structures (Edwards, 1989, 1991). Indoor activities are additionally apparent from the faunal and lithic remains. Animal bones are commonly present in these structures, probably representing cooking (indoor hearths) and maybe even, to some extent, storage. Flint artifacts are abundant, including all debitage categories and tool types. It is thus reasonable to suggest that knapping took place inside the huts, and floor cleaning was not common. Ground stone implements, especially of basalt, are also found in some cases. In addition, there are caches of implements under floors. For example, under the two floors of hut 131 at Eynan, there were caches of pebbles and stone tools (Dollfus, 1985; Valla, 1988). The thickness of deposit accumulations within the stone walls reaches, in some cases, 50 – 60 cm. In most examples there are no distinct successive layers or floors within these fills. That is to say, the debris accumulated during a relatively long time, with no construction of new floors and no apparent cleaning of the refuse at the corners nor outside altogether. Obviously, the in situ preservation of such accumulations was possible because the sunken floor and surrounding stone walls created a protected place for the material from being washed away by natural processes. The Natufians constructed some of their dwellings exactly on top, or almost so, of previous structures (Edwards, 1989). This could reflect a continuous ownership of a location within the camp. Alternatively, and even harder to test archaeologically, it could also point to some space shortage where, because of social organization or local political constrains, people were forced to build their homes at the same place again and again. The continuous building of structures within the Natufian large sites had a direct impact on the landscape. Never before were so many building materials, both in terms of variety (especially stone, but probably also mud and wood) and quantity, brought into a dwelling site year after year. The result was a true mound. Although in most open-air Natufian sites the total thickness of deposits is on a scale of 0.5 – 1 m, continuous building activities did form a mound, which remained on the landscape for a millennia. PPNA structures The first evidence for an in situ PPNA phase in the southern Levant has been known from Jericho and Nahal Oren since the 1950’s, but it was detailed volumes of the Jericho report that established in literature the material characteristics of the earliest large villages in the southern Levant (Kenyon, 1981; Kenyon, Holland, 1982, 1983). The largest two sites (Jericho and Netiv Hagdud) are only 12 km apart. They are both located in the Lower Jordan Valley, but excavated in two different ways. In Jericho the PPNA remains were exposed in the bottom of deep narrow trenches, as that was the only way to get through the thick later layers. In contrast, the Netiv Hagdud mound has no post-PPNA overlying deposits. Accordingly, more than 600 sq. m of the Neolithic village were exposed, most of which were in one continuous area (Bar-Yosef, Gopher 1997). Smaller sites, or sites with smaller excavation areas (though all 42 with architectural remains), include ‘Ain Darat (Gopher, 1996), Dhra (Kuijt, Mahasneh, 1998), Gesher (Garfinkel, 1990), Gilgal (Noy, 1989; Noy, Schuldenrein, Tchernov, 1980), Hatula (Lechevallier, Ronen, 1994), Iraq-ed-Dubb (Kuijt, Mabry, Palumbo, 1991), Nahal Oren (Stekelis, Yizraeli, 1963; Noy, Legge, Higgs, 1973), and WF16 (Finlayson et al., 2000). All structures are round or oval in shape, although toward the end of the period there are sub-rectangle houses at Jericho. The most common building material is stone, though plano-convex sun-dried mud bricks are also common in some sites. It appears that stones were only used for constructing the foundations or lower parts of walls, as there are no preserved high walls, nor piles of collapsed stones along the walls. The upper parts and the roof were probably made of perishable materials. The floor, as in previous periods, is always lower than the surrounding surface to the depth of a step or two. The inner area of the structures varies even on an intra-site level. Thus, the oval structures at Netiv Hagdud are about 25 sq. m in area (although structure 40 is ca 35 sq. m), while the adjacent round structures are usually only 5 – 7 sq. m, but some are 10 – 12 sq. m. Similar dimensions have been recorded at other sites. Inner partitions of the structures are rare, but they do exist at Netiv Hagdud structure 8 (Bar-Yosef, Gopher, 1997: fig. 3.19) and maybe at the MJ-MH structure at area M, Jericho (Kenyon, Holland, 1981: plates 277 – 278). Interestingly, the former differs from all structures at the site in orientation, number of cup marks on heavy limestone slabs set into the floor, density of heavy duty stone tools, and the presence of obsidian implements (Bar-Yosef, Gopher, 1997; Nadel, 1997). Inner installations include occasional hearths and piles of fire cracked stones. Caches of implements have been recorded in some cases. Limestone slabs with cup marks are common, usually set into the floor, so that the upper surface of the stone is continuous with the floor. Additional evidence of in-door activities is provided by large quantities of flints, bones and other refuse. As in previous cases, the variety and quantities of finds indicate domestic activity in most of the structures. The thickness of deposits within the structures depends on the height of the preserved walls. In many cases, the thickness of the fill is more than 50 cm. However, in most sites it is rare to distinguish floor levels within these fills. At Jericho, successive floors and successive buildings are documented in several sections. Discussion Discussions of Neolithic architectural development and changes, as well as their interpretation in terms of social structure in the southern Levant (or the Near East in general), have been advanced by several scholars (e.g., (Aurenche, 1981; Banning, Byrd, 1989; Byrd, 1994; Flannery, 1972; Rollefson, 1997)). A perspective including earlier cultures, especially the Natufian, was provided by Byrd (2000) and can now be enlarged with the new finds from Ohalo II. It is assumed here, as in all the above-cited works, that most of the architectural remains represent dwellings and their satellite installations (used as workshops and storage facilities). Basically, this assumption rests on the size, shape, number, and distances between the structures on the one hand, and on the material remains recovered from their interiors on the other. Outstanding structures appear to be of public or ceremonial use, such as structure 1 at Eynan, structure 8 at Netiv Hagdud, and the tower with the adjoining complex at Jericho (for the latter see (BarYosef, 1986; Kenyon, Holland, 1981; Ronen, Adler, 2001). One of the most outstanding phenomena of the Early Epipaleolithic (Ohalo II) – Early Neolithic (PPNA) sequence is the number of similarities in terms of dwelling characteristics. First, in all sites, structures are oval and round, and only the U-shaped Natufian examples are different, although they too, could be seen as a variant of the oval shape with a large entrance at the narrow end. Second, all structures are free standing and have no common walls, nor roofed passages between them. Third, in all documented cases, the floors were lower than the surrounding surface by 20 – 50 cm. That is, the first step in each construction was to dig a shallow depression in the shape and size of the planned structure. Fourth, building materials always included wood and perishable materials for the walls and roof. Stones were commonly used from the Natufian onward for wall bases, but in earlier sites they were only incorporated on a sporadic manner and scarcely served as the common building material of any structural element. Probably the most important fact would be that the basic unit was always a one-room structure with one entrance. Apart from rare PPNA examples, there are no remains of internal partitioning of the dwelling space. As has been stated in the past, this has direct implications upon the reconstructing of social organizations. Numerous ethnographic examples and various studies provide a model in which there is direct correlation between social structure and complexities of architectural dwellings (Banning, Byrd, 1989; Byrd, 1994, 2000; Kent, 1993; Kramer, 1979, 1982; Watson, 1979). The complexities could be measured by the number of rooms on the one hand, and the kind of entrance/passage between the open public area and the innermost room on the other. Indeed, in all documented examples discussed here, there was one inner space and a direct entrance from the public area into that space. If 43 the model is correct, and the basic unit of dwelling reflects social structure, then the basic social unit did not change much from the days of Ohalo II, until the end of the PPNA. The floor area of dwellings is of particular interest. The issue of the construction (built roof) area and population size has been discussed in detail in many works and will not be elaborated here (e.g., (Byrd, 2000; Naroll, 1962; Van Beek, 1982; Watson, 1979)). Rather, the continuity of dwelling size from Ohalo II until the PPNA in the Jordan Valley should be stressed. In Ohalo II, Eynan (early and late Natufian) and Netiv Hagdud, there are dwellings with an inner area of ca 8 – 12 sq. m, probably representing the indoor domestic area of a nuclear family. It is true that in all sites, there are other smaller or larger structures. For example, larger structures are found in the early Natufian, where building techniques were better than ever before. They could reflect larger residential groups at the beginning of the period. In addition, it is possible that at least some of the larger structures served as public centers within the camps or villages (see (Goring-Morris, 1996)). At Netiv Hagdud, most of the structures are round and have a standard area of ca 8 – 12 sq. m. The larger oval structures are found in the same layers, but they are less common, and at least one (N 8) of the three is definitely different from all excavated structures and is interpreted as a public building. So, although there are large structures in some Natufian and PPNA sites or levels, a basic hut (8 – 12 sq. m) with typical domestic debris is much more common. In the arid zones of the southern Levant, the area is sometimes even smaller, as at the Harifian sites, which are contemporaneous with the final Natufian (GoringMorris, 1987, 1996). Hearths were the focal centers for a variety of activities, of which food preparation/consumption and tool manufacture/use are but two examples evident from the material remains. At Ohalo II most hearths are between the huts, in open public space. Accordingly, it is reasonable to suggest that many activities took place in a communal manner, with a high level of "sharing between families." This is not the case with the Natufian, where built hearths are common indoors. Such a shift could reflect an emphasis on family indoor activities, with less work done in the open, and less food sharing (if at all) carried out around an open-air fireplace. Such a shift is not surprising, as it is common knowledge that the Natufian settlements were larger and more permanent than ever before, and thus represent (in the archaeological record) a settlement pattern requiring a social organization different from the previous one. Furthermore, the elaborate burial customs and the variety and quantity of "art" manifestations have been interpreted in terms of a changing social organization (see (Bar-Yosef, 1998a; Bar-Yosef, Belfer-Cohen, 1989, 1992, 1999; Belfer-Cohen, 1991; Byrd, Monahan, 1995), but also see (Belfer-Cohen, 1995; Boyd, 2001) for a cautionary perspective). Another aspect of clear continuity is evident in successive floors in early Epipaleolithic camps (Ohalo II, Ein Gev I) and subsequent sites. In addition, the Natufians (in some cases) and the early Neolithic people (at least in Jericho) built dwellings directly on top of earlier ones. This continuity of use, both of the structure (successive floors) and the location (successive buildings), represents a system of on-site continuity and strong ties of people to their house and its place within the camp/village. It reflects the long-term use of the site, and could be used to argue in favor of sedentism in Natufian and later sites – along with other lines of evidence (Edwards, 1989). Another aspect of these ties could be seen in certain remains recovered from the dwellings. Thus, caches of selected items or piles of chosen artifacts, unusual arrangements of implements, or erect non-functional stones are present from the early Epipaleolithic onward (Nadel, 2002b; in press). Tentatively, they are viewed as reflections of symbolic behavior within the social context of life in the camp/village. As these remains were not common in the first place, and as they are not always preserved, there is a higher chance of encountering such cases when excavation areas are large. Throughout the discussed period, animal bones and flint implements are common finds on floors and in the fillings above them. They represent some of the domestic activities, which were similar throughout the period. However, the densities of finds changed dramatically through time, as has been shown in the past (Bar-Yosef, 1983; Nadel, 2001b). For example, the densities of flint tools drop from many hundreds (and even ca 2,000 tools per cubic m) to several tens when moving from Epipaleolithic to PPNA sites. Naturally, one of the major relevant factors is the fast accumulation of material within the later villages, dramatically decreasing the densities of remains. However, when densities of specific types (e.g., burins) on floors are considered (thus eliminating the general processes of mound build-up and sediment accumulation within abandoned structures), the differences between Ohalo II and Netiv Hagdud are small (Nadel, 2001b). Among several possible explanations, this could reflect a similar number of people occupying the floors for similar lengths of occupations. The Levantine architectural remains, especially in the Jordan Valley, show a high level of continuity in many aspects of the indoor built space and in the activities carried out within that space. During a period of approximately 10,000 years (from Ohalo II to Netiv 44 Fig. 13. A reconstruction of hut 1. Hagdud/Jericho) profound economic and technological changes took place. There was also social reorganization, but according to the basic dwelling unit, the residential space of the core family hardly changed. This is not to say, however, that the introduction of the built hearth in the Natufian home, and the development of new technologies and building materials during each period, were not important. Nonetheless, there is no visible diachronic increase in structural dimension, inner complexity of room numbers, or even in the shape of the structure. A general continuity in many aspects is clearly observed. Viewed from a different perspective, the social aspect of the Early Epipaleolithic – Early Neolithic architectural sequence discussed in this paper could be interpreted in another way. As it is clear that the Natufian overall social structure and settlement pattern were different from the preceding (size of sites and density of structures and material remains represent a sharp rise of on-site population density and permanence of occupation), the fact that most elements of the basic dwelling structure remained almost constant could be used to argue that one cannot always use architectural characteristics as a direct correlation of the general social structure. Along this line of argument, although some details appear to be similar and nuclear families could have occupied similar structures at different periods, the social framework was nonetheless distinct and thus not reflected by the built elements of basic social units. For example, the similarities presented in this work could be the result of adaptation to the environment. Accordingly, people in the Jordan Valley enjoyed relatively similar environments throughout the relevant periods, and hunted and gathered the same species for several millennia. Maybe for them, the changing social system had an impact on the number and density of basic dwelling units (and the relevant location of the domestic hearth), and not on many structural elements of the unit itself. Also, during the same period, symbolic aspects of social life were developed and established, of which burial customs and the use of mobiliary art items are two examples. In the southern Levant, the most dramatic observable revolution in the domestic space occurred by the onset of the PPNB period. The basic plan changed from oval/ round to rectangular, inner divisions and the use of plaster became common, and the overall size of structures (including the introduction of two-floor buildings) and village area increased dramatically. The Ohalo II people were living in simple oval structures (Fig. 13), in a lakeshore camp on a year-round basis. Their diet was based on cereals, fish and a variety of local plant and animal resources. Water, too, was available year-round. Thus, the idea of all-season residence in one location was not a Natufian invention, and was practiced on a local basis in certain times and places long before the Natufian. 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