Geology 1403Physical Geology
Box of Sedimentary Rocks
Shale
Shale
 Texture: Clastic
 Grain Size: Clay
 Origin: Clastic
 Uses: Drainage, Bricks, Clay
Siltstone
Siltstone
 Texture: Clastic
 Grain Size: Silt
 Origin: Clastic
 Uses: Not used too muchroad work, some statues and
tombstones, Tiles/pavers
Siltstone with mud cracks
Sandstone
Sandstone
 Texture: Clastic
 Grain Size: Sand
 Origin: Clastic
 Uses: Building Materials
 Remarks: Has a variety of colors
Conglomerate
Conglomerate
 Texture: Clastic.
 Grain Size: Sand to Pebble –ROUNDED PARTICLES
 Origin: Clastic
 Uses; Can be crushed to get materials for concrete and
pebbles
Breccia
Breccia
 Texture: Clastic
 Grain Size: Sand to pebble –angular or
rough
 Origin: Clastic
 Remarks: Same as conglomerate but
particles are not rounded
 Uses: Building Materials and Decorative
Stone
Shelly or Fossiliferous
Limestone
Shelly
Limestone
 Texture: Non Clastic
 Origin: Chemical
 Uses: Building Materials, Pavers, Road work
Coquina
Coquina
 Texture: Non Clastic
 Origin: Chemical
 Uses: Building Materials, Landscaping
 Remarks: A type of Limestone
Oolite
Oolite
 Texture: Non Clastic
 Origin: Chemical
 Uses: Building Material
 Remarks: A type of Limestone
Chalk
Chalk
 Texture: Non Clastic
 Origin: Chemical
 Remarks: A type of Limestone,
 Uses: A soil amendment, Mild abrasive, At one time used as
a antacid
Chert
Chert
 Texture: Non Clastic
 Origin: Chemical
 Uses: Landscaping, Roads, Made into spear and arrow
heads.
 Remarks: Some people call it river rock
Peat
Peat
 Texture: Non Clastic
 Origin: Organic
 Uses: Burned to produce heat- Contains too much water so
very smoky, added to soil for improvement, grow plants in it
Lignite
Lignite
 Origin: Organic
 Remarks: Brown Coal, Used in Texas
Low- Medium Grade of Coal
Bituminous Coal
Bituminous Coal
 Origin: Organic
 Remarks: U.S. uses this to produce electricity, contains sulfur
a house built out of Coal 1926
Anthracite
Anthracite
(= Metamorphic), but was put in this
group for comparison with the other
types of coal.
 Origin: Organic
 Remarks: The best Coal