ABSOLUTE AGE
SUB-PERIOD
SERIES
STAGE
NEWFOUNDLAND
GRAPTOLITE
ZONE
390 Ma
395 Ma
Middle Devonian
Early Devonian
Table 1
Eifelian
Emsian
400 Ma
405 Ma
?
410 Ma
?
Loon Bay
batholith
Emsian
Pragian
Pragian
415 Ma
Early Devonian
Late Silurian
420 Ma
Pridoli
Ludlow
ABANDONED STRATIGRAPHIC TERMS
[Gedinnian]
425 Ma
Ludlow
Wenlock
eugeosynclinal rocks akin to
strata in modern island arcs
Badger Bay Series
[Espenshade, 1937]
Middle Ordovician
430 Ma
Crescent Lake shale of Badger Bay Series
correlated with supposed graptolitic Normanskill
beds of the Sivier Fm of the Exploits Series
Springdale Fm correlative with Botwood Fm
M. turriculatus
M. sedgwickii
Pilleys Series
[Espenshade, 1937]
Ordovician
435 Ma
Late Ordovician
M. triangulatus
C. cyphus
445 Ma
fossil-bearing marine & terrestrial Silurian
strata above dated mid-Ordovician strata
Hirnantian
Rawtheyan
Ashgill
Caradoc
450 Ma
P. pacificus
Farewell Group
[Baird, 1950, 1958; Patrick, 1956]
Late Ordovician - Late Silurian
D. complexus
Silurian marine to terrestrial transition
D. complanatus
P. linearis
Dunnage Formation
[Kay & Eldredge, 1968; Kay, 1976]
Cambro-Ordovician
D. clingani
455 Ma
?
Exploits Group, Dunnage Melange, Lawrence
Harbour Formation and Badger Group of the
Exploits Subzone. Cottrells Cove Group and
Moretons Harbour Group of the Notre Dame
Subzone
?
No
exotic olistoliths in pebbly mudstones &
broken formations representing several
Exploits Series units
Data
Mount Peyton batholith
Hill
Group
[oldest dated gabbro in
Hodges Hill batholith]
?
Parts of the Exploits Group, the Badger Group
and the Botwood Group
complexes display faulted
contacts with Point
Leamington Fm
Williams [1962] found the Farewell Group to
contain the Silurian Indian Islands Group & his
mostly terrestrial formations of the Silurian
Botwood Group
Dunnage Formation supercedes Heyl's Sivier Fm
greywacke and Foulke Cove Fm shale. Dunnage
melange & oceanic deposits of adjacent eugeosynclinal units first explained by plate tectonic theory
Dunnage Formation more commonly referred
to as the Dunnage Melange of the Exploits
Subzone, as external stratigraphic boundaries
have not been observed
Caradoc
Llandeilo
Campbellton Sequence
[Kay, 1975]
Middle Ordovician
oceanic-plate sedimentation & volcanism
N. gracilis
?
?
?
faulted contact ?
No
Age
Data
465 Ma
D. decoratus
P. tentaculatus
?
Moretons
Haywards Cove Fm
Western Head Fm
conformable contact
Western Head Fm
Western Head Fm
conformable lower contact
with Fortune Harbour Fm
conformable contact
Little Harbour Fm
Middle Ordovician
Early Ordovician
Llanvirn
Arenig
P. tentaculatus
U. austrodentatus
conformable contact
Western Head Fm
Moores Cove Fm
conformable contact
Fortune Harbour Fm
Harbour
Wild Cove Fm
[Late Arenig]
[Middle Arenig]
475 Ma
?
Chanceport
?
Cottrells
l. v. victoriae
l. v. lunatus
Sweeney Island Fm
?
?
?
No
Age
Data
conformable contact
[Middle Arenig]
[Early Arenig]
480 Ma
Arenig
Tremadoc
485 Ma
Group
P. fruticosus
T. akzharensis
Webber Bight Fm
Sweeney Island Fm
[New World Island]
[No Age Data]
[Fortune Hr. Peninsula]
[No Age Data]
T. approximatus
A. victoriae
Group
Fortune Harbour Fm
Point Leamington Fm
Lawrence Harbour Fm
conformable upper contact
with Pt. Leamington Fm
Hill
Pennys Brook Fm
youngest block age
[includes Riding Island
greywacke and conglomerate]
?
?
Sansom Fm
Campbellton greywacke
[type area]
Luscombe Fm
No
Age
Badger
Data
Group
Exploits
faulted contact
with Wigwam Fm
of Botwood Gp
Lawrence Harbour Fm
Strong Island chert
range
?
No
Badger
Age
Point Leamington Greywacke
black graptolitic shale
Group Milliners Arm Fm
Dark Hole Fm
faulted contact
Dunnage
Victoria
490 Ma
Pennys Brook Fm
Sparrow Cove Fm
conformable contacts amongst
the Omega Point, Sparrow Cove,
& Pennys Brook formations
L
I
N
E
Group
[Early
Tremadoc
?
Moretons
[range of
Island
conformable lower contact
with Lawrence Head Fm
limestone
Strong Island chert
Lawrence Head Fm
Luscombe Fm
Loon Harbour volcanics
conformable contact
upper New Bay Fm ?
complex
Early Ordovician
Late Cambrian
Point Leamington Formation : overlies Lawrence Harbour Formation and
includes the Randells Cove Conglomerate and similar units
500 Ma
505 Ma
Late Cambrian
Middle Cambrian
New Bay Fm
Annieopsquotch
basalts and
conformable contact
Sparrow Cove Fm
Omega Point Fm
faulted contact with
Pennys Brook Fm
?
Saunders Cove Fm
faulted contact
South
conformable contact
Glovers Harbour volcanics
?
Lake
[Leading Tickles Pt. Leamington area]
Igneous
Igneous
No Age Data
Lake
Complex
youngest block age
Tea Arm Formation
Group
other
limestones]
Formation
faulted contact with
Glovers Harbour volcanics
Group
?
Twillingate trondhjemite
N.B.: Victoria Lake Group
outcrops immediately
southwest of NTS 2E
intrusive contact
Sleepy Cove Group
510 Ma
[Sleepy Cove Fm of the
Lushs Bight Group?]
Milliners Arm Formation : overlies Dark Hole Formation and includes minor
units of Goldson Conglomerate
Gull Island Formation : overlies Shoal Arm Formation and includes some
Sansom Greywacke units
Sansom Greywacke : overlies Rogers Cove Formation and includes Sansom
Formation, Big Muddy Cove Formation and greywacke units of the
Pikes Arm Formation (also directly overlies Summerford Group and
includes Goldson Formation)
515 Ma
520 Ma
Middle Cambrian
Early Cambrian
Tulks Hill volcanics
Melange
Upper Black Island Greywacke : overlies Luscombe Formation and includes
Upper Black Island Argillite, Upper Black Island Limestone and
Hummock Island Chert units
faulted contact
originally unconformable ?
Botwood Group
faulted contact
faulted contact
Dunnage
Melange
Duder
Complex
Hamilton
Woody Island
siltstone
Sound
Carmanville Dog Bay
Point melange
Group
Noggin Cove Fm
?
?
faulted contact
Campbellton Greywacke : overlies Luscombe Formation and includes Norris
Arm Greywacke and several Lewisporte Conglomerate units
Group
?
Luscombe Fm ?
?
Point Leamington Greywacke : type Badger Group overlies unnamed black
shale unit and includes some Goldson Conglomerate units
Harbour
Upper Black Island
greywacke
?
faulted contact with
Pennys Brook Fm &
New Bay Fm of
Exploits Gp
?
495 Ma
L
I
N
E
mud - magma mixing
Complex
BADGER GROUP TERMINOLOGY
faulted erosional disconformity
with shale units & melange units
of Hamilton Sound Group
lower limit of Cobbs Arm limestone
oldest matrix age
No Age
Data
Charles Cove Fm
igneous
faulted contact with
Exploits Gp & Wild Bight Gp
?
Group
Victoria Mine volcanics
?
Phillips
?
[Late
Tremadoc]
B
A
Y
[includes Joe Whites Arm shale,
Rogers Cove shale,
Cheyneyville conglomerate]
unnamed chert &
black shale unit
of
Islands
Data
Head
Complexes
Big Indian Pond Fm
conformable contact
erosional disconformity
with Luscombe Fm
Sansom Fm
Rogers Cove Fm
upper limit of Cobbs Arm limestone
Indian
Horward Fm
?
[type area]
Summerford
?
?
Upper Black Is.
greywacke
?
faulted contact
[includes Baytona chert, Mn
beds and black graptolitic
shale]
?
?
Milliners Arm Fm
?
Group
Hummock
Hodges Hill batholith ?
** lower
contact
with
Rogers
Cove
Fm
?
Big Indian Pond Fm
[Goldson-type conglomerate]
conformable lower contact
with Strong Island chert
Shoal Arm Fm
conformable upper contact
with Shoal Arm Fm
Group
[granite displays intrusive contact
with Point Leamington Formation
and Point Leamington Greywacke]
?
[informally
?
Point
Randells Cove conglomerate [Goldson-type conglomerate]
Leamington
Greywacke]
Gull Island Fm
Shoal Arm Fm
Bight
Cove
?
Goldson Fm
Big Muddy Cove Fm
[informally
Sansom
Greywacke]
[granite]
[includes parts of Hayes'
Beaver Bight member]
Wild
Llandeilo
Llanvirn
Badger
includes Lawrence Harbour shale
[with "Normanskill" graptolite
fauna]
Sops Head
[oldest granite pluton in
Hodges Hill batholith]
?
Hodges
batholith
?
Group
youngest internal
tectonized unit
I
N
D
I
A
N
faulted contact
Campbellton greywacke
Mount Peyton batholith
Group
460 Ma
Lawrenceton Fm
?
&
In probable ascending order, the Rideout Point Fm, Middle and upper parts of the Exploits Group,
Loon Harbour Fm volcanics, Luscombe (Point) Fm, late Caradoc Luscombe Formation black shale,
& Riding Island Fm greywacke. Unbroken Campbell- and the lower part of the Badger Group
ton sequence units perceived as closely related to
the Dunnage Fm melange.
D
O
G
[Sansom-type greywacke]
Badger Gull Island Fm
R
E
D
intrusive Loon Bay contact
with Dunnage Melange in
dynamic amphibolitefacies hornfels
[unconformable contact with
Lake Ambrose volcanics]
batholith
?
[Granodiorite-tonalitegranite porphyry]
Rogerson Lake Conglomerate
Wigwam Fm
Lawrenceton Fm
**
Boones Pt.
In the Horwood Bay sequence, terrestrial units of the
Farewell Group were placed below marine units of
the Indian Islands Group. Springdale Fm equivalents
lay above the Indian Islands Group.
Group ?
intrusive contact with Campbellton
greywacke in migmatitic
amphibolite-facies hornfels
[Goldson-type conglomerate]
granite and gabbro plutons display
intrusive contacts with Wild Bight Gp,
Shoal Arm Fm and Gull Island Fm
batholith
[oldest Ar/Ar biotite age on
Mount Peyton batholith]
Badger
?
complexes display
intrusive contacts with
Hodges Hill and Loon
Bay batholiths
Loon Bay
batholith
?
granite displays intrusive contact with
Charles Lake volcanics of Botwood Gp
Mostly the Cutwell Group of the Notre Dame
Subzone with some Lushs Bight Group.
Roberts Arm Group absent from Pilleys Series.
?
Botwood
Mount Peyton batholith
[gabbro - diorite]
Wild Bight Group, Sops Head Complex, Shoal
Arm Formation and Badger Group of the
Exploits Subzone. Crescent Lake Formation
and other terranes of the Roberts Arm Group
of the Notre Dame Subzone
In ascending order, Notre Dame Bay volcanics,
Upper Black Island marble, Goldson Fm and
Botwood Fm. Dated Silurian units were correlated
with parts of supposedly Middle Ordovician Exploits
Series & Badger Series
Age
N.B.: Rogerson Lake Conglomerate outcrops
immediately southwest of NTS 2E
?
?
Wigwam Fm
?
intrusive Loon Bay contact
with Upper Black Is. greywacke in static greenschistamphibolite facies hornfels
intrusive Loon Bay contact with
Badger Group conglomerate
C. bicornis
Late Ordovician
Middle Ordovician
470 Ma
?
Hodges Rb/Sr age on Hodges Hill Granite
C. extraordinarius
D. anceps
Cautleyan
Pusgillian
In ascending order, Wild Bight volcanics, Beaver
Bight Fm, Shoal Arm Fm, Gull Island Fm, Julies
Harbour Gp, Burtons Head Gp, Crescent Lake
shale and Roberts Arm volcanics. Springdale Fm
unconformable on Badger Bay Series.
In ascending order, Cutwell Gp volcanics & sediments [including unnamed fossil-bearing limestone
unit] and Lushs Bight Group volcanics
Notre Dame Series
[Twenhofel and Shrock, 1937]
Ordovician - Silurian
Llandovery
Ashgill
[Granodiorite-tonalitegranite porphyry]
Hodges
partial equivalents of Badger Bay Series, in
particular the Cutwell Group
440 Ma
Early Silurian
Loon Bay
batholith
Hill
Wenlock
Llandovery
Aeronian
Rhuddanian
Loon Bay batholith
CURRENT STRATIGRAPHIC USAGE
In ascending order, Luke Arm Fm, Hornet Fm, and
Sansom Fm were correlated with Chazyan Llanvirn[Llandeilo] strata in New England & Foulke Cove Fm,
Sivier Fm, Mortons Fm, Breakheart Fm, Lawrence
Harbour shale and Fortune Fm were correlated with
New England's Normanskill [Llandeilo-Caradoc}
strata
Exploits Series
[Heyl, 1936]
Middle Ordovician
Homerian
Sheinwoodian
Telychian
Aeronian
?
Botwood
Ludfordian
Gorstian
Late Silurian
Early Silurian
INFORMAL STRATIGRAPHIC SUBUNITS
?
?
intrusive Loon Bay contact
with Moores Cove Fm of
the Cottrells Cove Group
Lochkovian
?
?
Victoria
Lake
Group
?
Lake Ambrose volcanics
oldest block age
?