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sea level sea level
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BUTTER POT
A DB C
LittleHarbourEast
TRINITY BAY SYNCLINORIUM CONCEPTION BAY ANTICLINORIUM BAY BULLS SYNCLINE
WHITBOURNESYNCLINE
SNOWS PONDSYNCLINES
PR
EA
D E
AG
LE
TH
RU
ST
Ocean Pond
PE
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RIV
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HO
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coast
CPH
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TR
IN
IT
Y B
AY
YA
B N
OI
TP
EC
NO
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LE
NN
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AE
P L A C E N T I A
B A Y
S T . M A R Y ’ S
B A Y
T R E P A S S E Y
B A Y
HTIMS
S OU
ND
N
OR
T H W E S T
S O U T H W E S T
A R M
DNUOS R A N D O M
A R M
Ha rbou r
Deer
Bu
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T i c k l e
B a y
Co l l i e r
Ba y
D i ld o
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Di ld
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Gra
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Spaniard’s B
ay
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Brigus Bay
evarG eD yaB
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ay
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Bay BullsBig Pond
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Bay Bulls
Mobile Bay
Witless
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Cape Broyle Harbour
Calvert Bay
Acquaforte Hr.
Chance Bay
Clear CoveFermeuse Hr.
Renews Hr.
Frenchm
an’s Cove
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ove
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ay
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r.
Long Harbour
GreatPinchgut
PumblyCove
ehc
na
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nr
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ay
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B A C C A L I E U
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edre
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Bryants C
ove
Seal Cove
Shoe Cove
Clam Cove
Broad Cove
Cape Cove
Long CoveWatern Cove
Arn
old C
ove
Shoa
l Bay
Mall
Bay
Wild Cove
The Th
oro
ug
hfa
re
Rocky Pond
Fagans Pond
Lady
Pond
PittmansPond
IslandPond
NorthernBay Bk.
WesternPond
.d
P evoC laeS
LongPd.
BroadCove
Bk.
GullPd.
Long
Pond
OceanPd.
RiverheadLongPd.
Shoe
Cove
Bk.
BigGullPd.
SnowsPond
Grand
Pd.
North
River
Paddys Pond
Petty
Harbour
Long Pd.
RoundPond
Sea
lC
ove
R.
Ocean
Pond
Country
Pond
Mobile First Pond
Tors CovePd.
Paradise Pond
La
Manche
R.
Cape
Pond
Big
Pond
utheoS ast
River
Southeast Arm
LittleBarachois
RiverSkin
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ond
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Bara
chois
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er
River
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Salm
onier
reinomlaS
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er
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R.
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Little
Harbour
Pd.
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el
Pond
SouthWestPd.
GibbonsPond
Back
River
GullPd.
Chance
Cove
Brook
Bis
cay
Bay
Riv
er
Back
Brook
Nor
thwes
t
Nor
thea
st
Bro
ok
Old WomanBk
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ok
Northeast Pond
MountMiseryPond
Tocher’sPond
Laden
’sdlei
F
Bk.
Peter
’s
Deer
River
River
Deer
Pond
Por
tuga
l
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Bk.
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ly
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’s
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er Riv
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R.
St.
St.
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ts
Shores
Gooseberry Cove
Ship Cove
GullCove
Brierly Cove
Jiggling Cove
Red Cove
100
202
101
101
CapeSt. Francis
Holyrood
LongHarbour
ST. JOHN’S
Cape Race
Cripple RockPt.
MistakenPt.
FreshwaterPt.
La Haye Pt.
Frapeau Pt.
Lansecan Pt.
Maggotty Pt.
Beckford Hd.
Branch Hd.
Point Lance
PointLance
Bull andCow
Norther Hd.
Cape St. Mary’s
Cross Pt.
Breme Pt.
FalseCape Redland Pt.
Red Hd.
North Pt.
Point La Haye
BranchGaskiers
St. Mary’s
Riverhead
MallBay
AdmiralsBeach
Great ColinetIsland
Little ColinetIsland
Mussel Pond Pt.
Harricott Pt.
CapeDog
Argentia
Freshwater
Dunnville
Fox Harbour
Ship Harbour
SoutheastPlacentia
Placentia
Dildo
NewHarbour
Green’sHarbour
Whiteway
Cavendish
Hopeall
Heart’s Delight
Heart’sDesire
Heart’sContent
BELL
ISLAND
PouchCove
Flat Rock
Logy Bay
Outer Cove
Torbay Pt.Torbay
Sugarloaf Hd.
Cape Spear
North Hd.
Motion Hd.
St. Bride’s
Cuslett
PettyHarbour
Bay Bulls
WitlessBay
Mobile
Tors Cove
Burnt Cove
Bauline East
Brigus South
Calvert
Aquaforte
Fermeuse
Kingman’s
Renews
Cappahayden
Ferryland
Cape Broyle Brigus Hd.
Cape Broyle
Ferryland Hd.
Bear Cove Hd.
Bear Cove Pt.
Burnt Pt.
Cape Ballard
Chance Cove Hd.
Renews Hd.
Iona
Islands
Long HarbourHead
Fair Haven
Little HarbourEast
Bellevue
SouthernHarbour
Arnold’sCove
Come ByChance
Sunnyside
Pinchgut Pt.
Little Harbour Hd.
Brennan Pt.
Fairhaven Pt.
Bull.I.
Masters Hd.
Western Hd.
Green Hd.
Tickle HarbourPt.
Collier Pt.
Norman’sCove
ChapelArm
OldShop
DildoSouth
Blaketown
PlacentiaJunction
Whitbourne
Hopeall Hd.
New Perlican
Winterton
Hants Hd.New Chelsea
NewMelbourne
SibleysCove
LeadCove
Brownsdale
Perlican I.
Old Perlican
Daniel’sCove
Breakheart Point
Grates Cove
Red Head Cove
Low Point
Caplin Cove
Lower Island Cove
Northern Bay
Ochre Pit Cove
Western Bay Hd.
Western Bay
Adams Cove
Blackhead
Salmon Cove
Victoria
Carbonear
Perry’s Cove
Freshwater
Bristol’s Hope
Kingston
Broad Cove
Burnt Point
Gull Island
Bay de Verde
GratesPoint
Goldmine Head
Baccalieu
Island
Split Pt.
Flambro Hd.
Carbonear I.
HarbourGrace
Upper IslandCove
Spaniard’sBay
Shearstown
Butlerville
Bay Roberts
Coley’s PointSouth
Clarke’sBeach
Cupids
Brigus
Colliers
ConceptionHarbour
HarbourMain
SouthRiver
Makinsons
Marysvale
Riverhead
Harbour GraceIslands
Spare Pt.
Feather Pt.
Tilton
Green Pt.
Colliers Pt.
Burnt Pt.
Seal Cove
Upper Gullies
Kelligrews
Foxtrap
LanceCoveFreshwater
St. Thomas
Paradise
St. Phillips
WindsorHeights
Wabana
PortugalCove
Long Pond
Manuels
TopsailChamberlains
Riverdale
Kellys I.
LittleBell
I.
RedmansHd.
Ore Hd.
Bauline Red Hd.
Long Pt.
Bull Hd.
South Hd.
Gull I.
Witless Pt.
Tinker Pt.
Cape Neddick
LongBeach
Drook
PortugalCoveSouth
BiscayBay
Shoal Point
Daniel’s Point
Trepassey
PortugalPt.
CapeMuttonPowles
Hd.
CapePineCape
Freels
Eastern Hd.
Western Hd.
Gull Island Pt.
St. Shotts
Peter’s River
St. Stephen’s
St. Vincent’s
Cape English
False Cape
O’Donnells
koorB sllehctiM St. Joseph’s
New Bridge
Forest Field
St. Catherine’sHaricott
Mount CarmelNorth
Harbour
Colinet
LANSECAN
HILL
Crawley I.
Brine Is.
TrinnyCove
Is.
Niagara Pt.
Thames Harbour Pt.
Deer Harbour Hd.
North Hd.
Bald Hd.
Southeast Pt.
Southport
Hickman’s Harbour
Elliot’sCove
ClarenvilleSouth
Milton
GeorgesBrook
Barton
SomersetWhiteRock
HarcourtMonroe
GinCove
Thoroughfare
PopesHarbour
DelbysCove
Ireland’s Eye
Ivanhoe
ShoalHarbour
RedPt.
GrindstoneHd.
PigeonPt.
Tilton Hd.
Clarenville
Weybridge
DeepBight
Lady Cove
SnooksHarbour
AspeyBrook
CaplinCove
St. JonesWithin
Hodge’sCove
Island CoveLongBeach
HatchetCove
North WestBrook
Hillview
Adeytown
Gooseberry CoveLittle Heart’sEase
West Random Hd.
East Random Hd.
Verge I.
East Hd.
South Bird I.
North Bird I.
Green I.
Anthony I.
West Pt.
Ireland’s Eye Pt.
RaggedIslands
Duck I.
Silldown Pt.
Ireland’s
Eye
Long I.
LadyPt.
St. Jones Hd.
Big I.
Brittania
Souther Pt.
MountPearl
SAWYERSHILL
BEAVERPONDHILLS
KNOK HOURHILL
Latine Pt.
Isaac Pt.
Fox I.
Moll Pt.
Shalloway Pt.
Pointe Verde
Great Barasway
Little Barasway
Patrick’s Cove
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10 I40
A
B
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0 5 10
kilometres
Scale 1:250 000
15 20 25
Contours in feet above maen sea level. Contour interval 100 feet.
GOVERNMENT OFNEWFOUNDLANDAND LABRADOR
Department ofMines and Energy
Geological Survey
WABANA GROUP (individual formations not separated on map)
Gravel Head Formation: dark shale; layers of phosphatic and hematitic ironstone and silty shale near base
Gull Island Formation (Upper Ore Bed): oolitic reddish-brown ironstone
Grebes Nest Point Formation: dark shale, siltstone, and sand- stone
Scotia Formation (Middle Ore Bed): oolitic, reddish-brown ironstone
Powers Steps Formation: graptolitic shale and minor siltstone and sandstone; phosphatic and pyritic, oolitic ironstone at base
Dark gray, fine grained diabase dikesK/Ar 201 ± 2.6 Ma (whole rock) (Hodych and Hayatsu, 1980)
Diabase and diorite dikes containing euhedral plagioclasephenocrysts
CLARENVILLE GRANITE Pink to red, medium grained, biotite granite
POWDER HORN DIORITE COMPLEX Fine- to medium-grained diorite, gabbro and minor granite
Diabase, diorite and gabbro sills
Smith Point Formation
exposure positive aeromagnetic anomaly
IONA ISLANDSINTRUSIVE
SUITE
ClarenvilleGranite
POWDER HORNDIORITE COMPLEX
WABANA GROUP
Redmans Fm.
BE
LL
IS
LA
ND
GR
OU
P
HARCOURT GROUP
ADEYTON GROUP
Random Formation
unconformity
unconformity
unconformity(?)
Crown Hill Fm.
RockyHarbour
Fm.
TrinnyCoveFm.
Heart’sDesire
Fm.
Heart’sContent
Fm.
Piccos BrookMember
FlatRockCoveFm.
KnobbyHill Mr.
OldPerlican
Mr.
BlackheadFormation
CapeBallard
Formation
Maturin PondsFormation
Bay deVerde
Formation
Maddox Cove Mr.
Cuckold Formation
Ferry-landHeadFm.
Big Head
Formation
BaccalieuMember
CooksCoveMr.
GratesCoveMr.
HighRocks
Mr.
Quidi Vidi Formation
Gibbett Hill Formation
SwiftCurrentGranite?
Bull ArmFormation
Cappahayden Fm.
Renews Head Formation
Fermeuse Formation
Mistaken PointFormation
Trepassey Formation
Briscal Fm.
Drook Formation
WhalesbackGabbro etc.
TorbayMr.
ClamCoveMr.
CapeEnglishMemberPeter’s
RiverMember
Biscay Mr.
South Point Mr.
Mall BayFormation
BroadCoveRiver
Member
HOLYROODINTRUSIVE
SUITE
HA
RB
OU
R M
AIN
GR
OU
P
MU
SG
RA
VE
TO
WN
G
RO
UP
SI
GN
AL
HI
LL
G
RO
UP
Gaskiers Formation
ST
. J
OH
N’S
G
RO
UP
CO
NC
EP
TIO
N G
RO
UP
CONNECTING
POINT
GROUP
BELL ISLAND GROUP (separated into lower, upper and Redmans Formation on map)
Dominion Formation (Lower Ore Bed): oolitic, reddish-brown ironstone
Ochre Cove Formation: interbedded, thin sandstone and shale, and glauconitic sandy siltstone
REDMANS FORMATION Gray to white orthoquartzite and minor siltstone
Beach Formation: micaceous siltstone, shale and sandstone; minor oolitic ironstone (McGraw and Eastern Head members)
Little Bell Island Formation: white sandstone interbedded with dark silty shale
Kellys Island Formation: dark silty shale and thickly bedded\ quartzose sandstone
SPREAD EAGLE GABBRO (and equivalents) Diabase and gabbro (may feed Cambrian volcanic rocks)
SIGNAL HILL GROUP (not listed in stratigraphic order)
BAY DE VERDE FORMATION Old Perlican Member: red and gray, white-weathering sandstone, siltstone and red mudstone
Baccalieu Member: red pebble to cobble conglomerate and sandstone; minor mudstone
Cooks Cove Member: green to gray sandstone and interbedded siltstone
Grates Cove Member: green siltstone and sandstone
FLAT ROCK COVE FORMATION Piccos Brook Member: locally derived breccia and red muddy sandstone
Knobby Hill Member: gray conglomerate and siltstone
BLACKHEAD FORMATION Red and gray sandstone, siltstone and shale
Maddox Cove Member: red mudstone and sandstone exhibiting distinctive wavy bedding
CAPE BALLARD FORMATION Thickly bedded gray sandstone and quartz-granule conglomerate
Gray shale and siltstone, minor purple shale
FERRYLAND HEAD FORMATION Thin to medium bedded, gray sandstone; minor conglomerate
High Rocks Member: red, wavy bedded sandstone and shale
CUCKOLD FORMATION Red, pebble to cobble conglomerate and sandstone
QUIDI VIDI FORMATION Red and green sandstone; minor pebble conglomerate and mudstone
GIBBETT HILL FORMATION Thickly bedded, light-gray sandstone; locally thinly bedded, greenish-gray to red sandstone, siltstone, tuff and conglomerate
Minor red sandstone and siltstone
CAPPAHAYDEN FORMATION Laminated gray siltstone
NOTE: The Signal Hill and St. John’s groups of Williams and King (1979)and the Musgravetown Group of McCartney (1967) have been revised toinclude parts of the Hodgewater Group of Hutchinson (1953) and McCartney(1967). The name, Hodgewater Group, and the names of the group’s sub-divisions are not used on this map.
ST. JOHN’S GROUP
RENEWS HEAD FORMATION Thin, lenticular bedded, dark-gray sandstone and minor shale
FERMEUSE FORMATION Gray to black shale containing thin lenses of buff-weathering sandstone and siltstone; mainly light-gray, thinly bedded, contorted shale and sandstone near base
TREPASSEY FORMATION Medium to thinly bedded, graded, gray sandstone and shale; minor tuffaceous rocks
WHALESBACK GABBRO (and equivalents) Fine to coarse grained gabbro (age of intrusion uncertain)
CONCEPTION GROUP
MISTAKEN POINT FORMATION Upper part: red and green tuffaceous siltstone and sandstone Lower part: medium bedded, gray to pink sandstone and green to purple and red shale; minor thin tuff horizons; fossiliferous near top
BRISCAL FORMATION Thickly bedded, coarse grained, gray sandstone, olive to gray argillite, red arkosic sandstone; local units of thinly bedded gray siltstone and shale
DROOK FORMATION (not listed in stratigraphic order) Green siliceous siltstone and sandstone; silicified tuff
Clam Cove Member: gray, pebbly siltstone and shale
Peter’s River Member: gray, coarse grained sandstone
Biscay Member: altered green to purple basalt, locally pillowed
Cape English Member: gray to pale-red, thickly bedded sandstone
Torbay Member: red and green, medium to coarse grained, parallel-laminated sandstone, associated with mixtite
Bauline Line Member: volcanogenic mixtite (possible northern equivalent of Gaskiers Formation)
Broad Cove River Member: thickly bedded chert and sandstone
GASKIERS FORMATION South Point Member: red agglomerate
Gray mixtite (tillite); red mixtite overlain by red mudstone at top
Gray to red mixtite (correlation with Gaskiers Formation uncertain)
MALL BAY FORMATION Green siliceous siltstone, argillite and tuff; thickly bedded quartzose sandstone
IONA ISLANDS INTRUSIVE SUITE
Gray, medium grained diorite, gabbro and olivine gabbro
Reddish-pink, medium grained granite and granite dikes and sills, locally containing abundant gabbro inclusions
HARCOURT GROUP (individual formations not separated on map)
Clarenville Formation: gray to black, micaceous shale; minor siltstone containing cone-in-cone limestone concretions
Elliott Cove Formation: gray, green to black, silty, micaceous shale, slate and siltstone; limestone concretions
Manuels River Formation: black shale and lenses of limestone; mafic pillow lava and pyroclastics, including Hay Cove and Chapel Arm members
ADEYTON GROUP (individual formations not separated on map except Smith point Formation)
Chamberlains Brook Formation: green and red shale or slate and thin limestone beds; manganiferous bed near base; spilitic cherty pillow lava, including Cape Dog and Hopeall Head members
Brigus Formation: red, pink and green shale or slate and thin limestone beds; basal conglomerate where formation rests directly on Precambrian rocks
SMITH POINT FORMATION Pink massive limestone containing red shale partings and algal structures
Bonavista Formation (locally absent): red, green and purple shale or slate and thin limestone beds; local quartz-pebble conglomerate at base
RANDOM FORMATION White orthoquartzite interbedded with green, gray and red arkose and siltstone; local basal conglomerate
MUSGRAVETOWN GROUP (not listed in stratigraphic order)
Undivided sedimentary rocks
CROWN HILL FORMATION Red pebble conglomerate and sandstone; locally, red siltstone at base; minor green conglomerate
ROCKY HARBOUR FORMATION Yellowish-green, cross-bedded, lithic sandstone
TRINNY COVE FORMATION Olive-green and red sandstone, siltstone and conglomerate; minor gray shale containing wispy sandstone laminae
HEART’S DESIRE FORMATION Olive-green sandstone
HEART’S CONTENT FORMATION Gray to black shale containing wispy sandstone laminae
Bellevue Beach Member: gray pebble conglomerate
MATURIN PONDS FORMATION Red sandstone and mudstone exhibiting distinctive wavy bedding; minor conglomerate
BIG HEAD FORMATION Gray to red arkose and granule conglomerate
Wavy bedded, gray to green tuffaceous siltstone and arkose; locally includes Whiteway Member consisting of red sandstone and siltstone
Gray to green volcanogenic mixtite
BULL ARM FORMATION Felsic flows and tuffs, and clastic sedimentary rocks
Mafic flows; includes minor felsic flows and clastic sedimentary rocks
Predominantly crystal and lithic tuffs, commonly reworked
Mafic to felsic variegated flows, and pyroclastic and clastic sedimentary rocks ( at west edge of map was formerly assigned to the Love Cove Group)
SWIFT CURRENT GRANITE(?) Pink to gray, medium grained granite to granodiorite; minor diorite and gabbro
Pluton is presumed to be related to the Swift Current Granite in the Belleoram (1M) map area, which has yielded the following radiometric dates (Dallmeyer et al., 1981): Rb/Sr 548 ± 11 Ma (whole rock)
40 39 Ar/ Ar 560 ± 15 Ma (hornblende)
40 39 Ar/ Ar 566 ± 15 Ma (hornblende) U/Pb 580 ± 20 Ma (zircon)
CONNECTING POINT GROUP
Green, gray and black shale, siliceous siltstone and sandstone; minor green conglomerate; numerous mafic dikes and sills
HOLYROOD INTRUSIVE SUITE
Medium grained, massive, pink to gray granite; minor aplite U/Pb 620 Ma (zircon) (Krogh et al., 1983)
Medium grained, pink, green and gray quartz monzonite, and quartz diorite to gabbro
+2.2-1.7
HARBOUR MAIN GROUP (not listed in stratigraphic order)
Green to dark-gray, massive to flow-banded and brecciated, rhyolitic intrusive and extrusive rocks
Red sandstone, conglomerate, slate; green tuffaceous siltstone and sandstone; includes minor felsic and mafic volcanic rocks
Pink to gray felsic tuff and agglomerate; pink to red rhyolite and welded tuff; includes minor mafic volcanic and clastic sedimentary rocks U/Pb 622 Ma (zircon) (T. Krogh, personal communication, 1986)
Green to purple basaltic flows and pyroclastic rocks; includes minor felsic volcanic rocks, clastic sedimentary rocks and gabbro
+2.2-2.0
LEGEND
??
TRIASSIC
DEVONIANOR EARLIER
SILURIAN(?)
LOWERORDOVICIAN
UPPER CAMBRIAN(?) TOLOWER ORDOVICIAN
MIDDLE CAMBRIAN(?) TOLOWER ORDOVICIAN
MIDDLE CAMBRIAN(?)
LOWER TO MIDDLECAMBRIAN
LOWER CAMBRIAN
Are
nig
Are
nig
(?)
Tre
ma
do
c(?
)
Tre
ma
do
c
HA
DR
YN
IA
N
Up
pe
rC
am
bri
an
Mid
dle
Ca
mb
ria
nL
ow
er
Ca
mb
ria
n
2D/1 2C/4 2C/3 2C/2
1N/151N/141N/131M/16
1M/9 1N/12 1N/11 1N/10
1N/71N/61N/51M/8
1M/1
1L/16
1N/4 1N/3 1N/2
1K/151K/141K/13
1K/12 1K/11
0 10 20 30
km
Williams and King (1979)
Jenness(1963)
Christie(1950)
McCartney(1958)
McCartney(1957)
McCartney(1956)
McCartney (1967)
McCartney(1954)
Hutchinson(1953)
Nixonand
Papezik(1979)
Millins(1970)
Fletcher(1972)
King(1985)
Rose(1952)
Ranger et al.
(1984)
Hsu(1978)
Hughes andMalpas (1971)
Map scales 1:250 000 and 1: 253 440
Map scales 1:50 000 and 1: 63 360
Map scales 1:25 000
Other scales
SOURCE MAPS FOR COMPILATION
Mapping and substantial revision of existing maps by A. F. King
Aeromagnetic anomaly, caused by unit , interpreted from mapspublished by the Geological Survey of Canada (1971a,b)
Mineral occurrences compiled by C. F. O’Driscoll
Offshore geology from King et al. (1986), and G. B. J. Fader andP. W. Durling (personal communication, 1986)
NOTE:
The purchaser agrees not to provide a digital reproduction or copy of this product to a third party. Derivative products should acknowledge the source of the data.
DISCLAIMER:
The Geological Survey, a division of the Department of Mines and Energy (the “authors and publishers”), retains the sole right to the original data and information found in any product produced. The authors and publishers assume no legal liability or responsibility for any alterations, changes or misrepresentations made by third parties with respect to these products or the original data. Furthermore, the Geological Survey assumes no liability with respect to digital reproductions or copies of original products or for derivative products made by third parties. Please consult with the Geological Survey in order to ensure originality and correctness of data and/or products.
King, A.F. (compiler)1988: Geology of the Avalon Peninsula,Newfoundland (parts of 1K, 1L, 1M, 1N and 2C).Map 88-001 (coloured). Scale: 1:250 000.Government of Newfoundland and Labrador,Department of Mines and Energy, MineralDevelopment Division. GS# NFLD/1680
Anderson, M.M., Bruckner, W.D., King, A.F. and Maher, J.B. 1975: The late Proterozoic ‘H.D. Lilly Unconformity’ at Red Head, northeastern Avalon Peninsula, Newfoundland. American Journal of Science, Volume 275, pages 1012-1027.
Christie, A.M. 1950: Geology of Bonavista map-area, Newfoundland (summary account). Geological Survey of Canada, Paper 50-7, 40 pages.
Dallmeyer, R.D., Odom, A.L., O’Driscoll, C.F. and Hussey, E.M. 1981: Geochronology of the Swift Current granite and host volcanic rocks of the Love Cove Group, southwesternAvalon Zone, Newfoundland: evidence of a late Proterozoic volcanic-subvolcanic association. Canadian Journal ofEarth Sciences, Volume 18, pages 699-707.
Fletcher, T.P. 1972: Geology and Lower to Middle Cambrian trilobite faunas of the southwest Avalon, Newfoundland. Unpublished Ph.D. thesis, Cambridge University, 294 pages.
Geological Survey of Canada 1971a: Trepassey, Newfoundland, Sheet 1K. Geophysical Series (Aeromagnetic), Map 7325G. 1971b: St. John’s, Newfoundland, Sheet 1N. Geophysical Series (Aeromagnetic), Map 7329G.
Hodych, J.P. and Hayatsu, A. 1980: K-Ar isochron age and paleomagnetism of diabase along the trans - Avalon aeromagnetic lineament- evidence of Late Triassic rifting in Newfoundland. Canadian Journal of Earth Sciences, Volume 17, pages 491-499.
Hsu, E. 1978: Pouch Cove - St. John’s, Newfoundland. Newfoundland Department of Mines and Energy, Mineral Development Division, Map 7836.
Hughes, C.J. and Brückner, W.D. 1971: Late Precambrian rocks of eastern Avalon Peninsula, Newfoundland - a volcanic island complex. Canadian Journal of Earth Sciences, Volume 8, pages 899-915.
Hughes, C.J. and Malpas, J.G. 1971: Metasomatism in the late Precambrian Bull Arm Formation in southeastern Newfoundland: recognition and implications. Proceedings of the Geological Association of Canada, Volume 24, pages 85-93.
Hutchinson, R.D. 1953: Geology of Harbour Grace map-area, Newfoundland. Geological Survey of Canada, Memoir 275, 43 pages. 1962: Cambrian stratigraphy and trilobite faunas of southeastern Newfoundland. Geological Survey of Canada, Bulletin 88, 156 pages.
Jenness, S.E. 1963: Terra Nova and Bonavista Bay map areas, Newfoundland (2DE’/ and 2C). Geological Survey of Canada, Memoir 327, 184 pages.
King, A.F. (Compiler) 1982: Guidebook for Avalon and Maguma Zones of Atlantic Canada. The Caledonide Orogen, International Geological Correlation Project 27. Memorial University of Newfoundland, Department of Earth Sciences, Report 9, 308 pages.
King, A.F. 1985: Geology of St. John’s (1N/10a,b), Cochrane Pond (1N/7f, north half), Torbay (1N/10g, south half), Petty Harbour (1N/7g, north half), Windsor Lake (1N/10c), Bauline Line (1N/10f, south half) and Topsail (1N/10d, east half) areas. Newfoundland Department of Mines and Energy, Mineral Development Division, Maps 8567-8573. King, L.H., Fader, G.B.J., Jenklns, W.A.M. and King, E.L. 1986: Occurrence and regional geological setting of Paleozoic rocks on the Grand Banks of Newfoundland. Canadian Journal of Earth Sciences, Volume 23, pages 504-526.
Krogh, T.E., Strong, D.F. and Papezik, V.S. 1983: Precise U-Pb ages of zircons from volcanic and plutonic units in the Avalon Peninsula. Abstracts with Programs, 1983, 18th Annual Meeting, Northeastern Section, Geological Society of America, Volume 15, page 135.
McCartney, W.D. 1954: Holyrood, Newfoundland. Geological Survey of Canada, Paper 54-3 (map only). 1956: Argentia, Newfoundland. Geological Survey of Canada, Paper 55-11 (map only). 1957: Dildo, Newfoundland. Geological Survey of Canada, Map 13-1956. 1958: Geology of Sunnyside map-area, Newfoundland, 1N/13. Geological Survey of Canada, Paper 584, 21 pages. 1967: Whitbourne map-area, Newfoundland. Geological Survey of Canada, Memoir 341, 134 pages.
Mullins, W.J. 1970: Geology of St. Catherine’s (east half) map-arsa (1N/3, E’/). Newfoundland Department of Mines, Agriculture and Resources, Geological Report Number 15, 13 pages.
Nixon, G.T., and Papezik, V .S. 1979: Late Precambrian ash-flow tuffs and associated rocks of the Harbour Main Group near Colliers, eastern Newfoundland: chemistry and magmatic affinities. Canadian Journal of Earth Sciences, Volume 16, pages 167-181.
O’Driscoll, C.F.
1977: Geology of the Sound Island map area (east half). In Report of Activities for 1976. Newfoundland
Department of Mines and Energy, Mineral Development Division, Report 77-1, pages 43-47.
O’Driscoll, C.F. and King, A.F. 1985: Mineral Occurrence Map, Avalon Peninsula, Newfoundland. Newfoundland Department of Mines and Energy, Mineral Development Division. Map 85-62.
Ranger, M.J., Pickerill, R.K. and Fillion, D. 1984: Lithostratigraphy of the Cambrian? - Lower Ordovician Bell Island and Wabana groups of Bell, Little Bell, and Kellys islands, Conception Bay, eastern Newfoundland. Canadian Journal of Earth Sciences, Volume 21, pages 1245-1261.
Rose, E.R. 1952: Torbay map-area, Newfoundland. Geological Survey of Canada, Memoir 265, 64 pages.
Williams, H, and King, A.F. 1979: Trepassey map area, Newfoundland. Geological Survey of Canada, Memoir 389, 24 pages.
REFERENCES
ACKNOWLEDGEMENTS Previously unpublished mapping by A.F. King benefittedgreatly during its early stages from the guidance of W.D.Bruckner (Conception Group), V.S. Papezik (Harbour MainGroup) and T. Fletcher (Cambrian biostratigraphy, Cape St.Mary’s peninsula). Special thanks are extended to M.M. Anderson, T. Calon, B. Greene, J. Malpas, S.J. O’Brien, C.F.O’Driscoll, G. Parsons, R.K. Stevens and H. Williams forcomments made in the field and for informal discussions.Capable field assistance was provided by J. Hill, T. Braceand D. Andrews. H. Miller and J. Tod are thanked for the interpretation of geophysical data, and C.F. O’Driscoll for the compilationof the mineral occurrences. The offshore geological data were provided by theAtlantic Geoscience Centre, Geological Survey of Canada, and have been published previously in a less detailed formin King et al., 1986. Special thanks are extended to G.B.J. Fader for his assistance in compiling the data for this map. Funding for part of this project was provided by theNatural Sciences and Engineering Research Council ofCanada under Grant A-7052 to A.F. King. The base map was assembled by the Geological Surveyof Canada from maps published at the same scale by theSurveys and Mapping Branch, Department of Energy, Minesand Resources in 1970, 1971. The bathymetric contours were provided by the CanadianHydrographic Service from the Natural Resource Map seriesand from unpublished maps.
GENERAL MINERAL OCCURRENCES
SYMBOLS
Detailed mineral occurrence data are published separately onMap 85-62 (O’Driscoll and King, 1985)
Status
Pruducer .................................
Developed prospect ...............
Past pruducer (dormant) ........
Past producer (exhausted) .....
Prospect .................................
Showing ..................................
Indication ................................
Au GoldBa BariteBri Brick shaleCly ClayCu CopperDtm Diatomaceous
earth Fe Iron Fl Fluorite Lst Limestone Mo Molybdenum Mn Manganese Pb Lead Po Pyrrhotite Pph Pyrophyllite Pyr Pyrite Sia Silica Stn Building stone
Commodity
F
P
Geological contact (defined, approximate,
assumed, gradational) ...........................................
Fault (defined, approximate, assumed, thrust) ......
Bedding tops known (inclined, overturned, horizontal) ..............................................................
Bedding tops unknown (vertical) ...........................
Cleavage (inclined, vertical) ..................................
Axis of minor fold (plunging) ..................................
Fold axis (anticline, syncline, with direction
of plunge ................................................................
Unconformity (shown on legend and
stratigraphic section only) …..................................
Fossil locality .........................................................
Problematical fossil marking ..................................
GEOLOGY OF THE AVALONPENINSULA, NEWFOUNDLAND
(parts of 1K, 1L, 1M, 1N and 2C)
Map 88-01(Digital reproduction)
1Geology compiled by A. F. King
Map series edited by S. P. Colman-Sadd and J. P. Hayes
Copies of this map may be obtained from the GeosciencePublications and Information Section, Geological Survey,Department of Mines and Energy, P.O. Box 8700, St. John’s,Newfoundland, Canada, A1B 4J6.http://www.geosurv.gov.nf.ca
Geological cartography by Tony Paltanavage.
Recommended citation: King, A.F. 1988: Geology of the Avalon Peninsula, Newfoundland(parts of 1K, 1L, 1M, 1N and 2C). Newfoundland Departmentof Mines and Energy, Map 88 – 01.
1Centre for Earth Resources Research, Department of
Earth Sciences, Memorial University of Newfoundland,St. John’s, Newfoundland A1B 3X5.
2L12I
12B 2D
1N
60° 52°
51°
50°
49°
48°
47°
51°
50°
49°
48°
47°
58° 56° 54°
58° 56° 54°
12H
12A
1M
2E
2M
2C
1K
11P11O
2F
St.Anthony
Port auxBasques
DeerLake
Stephenville
GrandFalls
Gander
J
12G
Labrador
1L11I
NEWFOUNDLAND
0 150
km
50 100
N.T.S. INDEX MAP
12P
CornerBrook
St.John's
b
CENTRAL MOBILEBELT (DUNNAGE-GANDER ZONES)Lo
ng R
ange
Gre
nvill
e In
lier
ophiolite
granite
HUMBERZONE
0 150
km
O60
O58
O58
O56
O56
O54
O52
O51
O51
O50
O50
O49
O48
O49
O47
GEOLOGICAL INDEX MAP
AVALONZONE
O48
O47
O54
pC
uo on rc Ge p t ni o
HarbourMain
Group?
HarbourMain
Group
HarbourMain
Group
HolyroodIntrusive
Suite
Wabana Group
Bell Island Group
Harcourt Group
Adeyton Group
upper Signal HillGroup
Gib
be
t t n o iH ti al l m rF o
St . J po uh on r’s G
pu
orG lli
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nh
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S
Con
nect i n
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Bull A
rm Form
ation
noit a B mig r o F H e ad
Pretectonic Spread Eagle Gabbro PretectonicWhalesback Gabbro
upper Musgravetown Group
Harcourt Group
Adeyton Group
Posttectonic Iona IslandsIntrusive Suite
Posttectonic ClarenvilleGranite
Powder Horn Diorite Complex intrudes Musgravetown Group west of map area. (O’driscoll, 1977).
Swift Current Granite(?) intrudes Bull Arm Formation. It is thought to be part of main Sw i f t Cu r ren t G ran i t e intrusion that outcrops west of map area. The latter intrusion appears to be related to Bull Arm Formation volcanism (Dallmeyer et al., 1981).
Mafic sills (Si) intrude Late Cambrian Elliot Cove Formation (Harcourt Group) and were folded during regional deformation of presumed Silurian-Devonian age.
Bull Arm Formation and Signal Hill Group are thought to be lateral equivalents because they underlie Big Head Formation on opposite limbs of Trinity Bay synclinorium. Abundant tuff in Gibbett Hill formation may be derived from bull Arm Formation volcanism.
Diabase dykes (Dd) intrude Musgravetown Group and Late Cambrian Elliot Cove Formation (latter relationship not shown on map) and postdate regional deformation of presumed Silurian-Devonian age.
Nature and age of basement rocks unknown. No rocks older than Harbour main and Connecting Point groups are e x p o s e d o n A v a l o n Peninsula.
RELATIONSHIPBETWEEN
CONCEPTION ANDHARBOUR MAIN GROUPSContact between Conception and Harbour main groups has been described as an angular unconformity (McCartney, 1967), a lateral facies change (Hughes and Br ckner, 1971) and a disconformity (Williams and King, 1979).
ü
Connecting Point Group is thought to be western equivalent of conception and St. John’s groups, due to facies similarity and inferred stratigraphic relationship between Bull Arm Formation and Signal Hill Group. Transition is hidden beneath Trinity Bay synclinorium.
LILLY UNCONFORMITYAt Flat Rock, Flat Rock Cove Formation (Signal Hill Group) lies unconformably on previously deformed Drook Formation (Conception Group) (Anderson et al., 1975). Granitic detritus shed into Signal Hill Group indicates unroofing of a pluton to northeast (King, 1979).
Triassic dykes ( ) intrude Whalesback gabbro and Drook and Fermuse formations in three separate exposures. Aeromagnetic anomaly implies near continuity between exposures. Age based on radiometric dating (Hodych and Hayatsu, 1980.
Northwest Trinity Bay to Point Lance:Cambrian Random Formation ( ) disconformably overlies Hadrynian Musgravetown Group and is itself disconformably overlain by Adeyton Group ( ) (Hutchinson, 1962; Fletcher, 1972).
Conception Bay:Random Formation is absent. Cambrian Adeyton Group ( ) unconformably overlies Holyrood Intrusive Suite, Conception Group and Harbour Main Group.
HADRYNIAN-LOWER PALEOZOIC RELATIONSHIPS
DIAGRAM OF MAJOR STRATIGRAPHIC RELATIONSHIPS(not drawn to scale)
MUI
RO
NILCI
TN
A Y
AB
NOI
TP
EC
NO
C
TR
INIT
Y B
AY
SY
NC
LIN
OR
IUM
SH
OE C
OVE F
AU
LT
BLA
CK
HE
AD
SY
NC
LIN
E
VIC
TORIA
AN
TIC
LIN
E
LO
NG
BE
AC
H F
AU
LTCOME BY CHANCEFAULT
NE
W C
HE
LS
EA A
NTIC
LIN
E
SR
ETEP
RIV
ER
FA
ULT
ENI
LC
NY
S Y
AB
YA
CSI
B
TO
PS
AIL
FA
ULT
FR
ES
HM
AN
S C
OV
E F
AU
LT
RE
TA
WH
SE
RF
ENI
LCI
TN
A
HC
NA
RB
ENIL
CIT
NA
ENI
LC I
TN
A S’
YR
AM .T
S E
PA
C
0 10 20 30
km
Musgravetown Group (excludingBull Arm Formation)
Bull Arm Formation
Conception and Connecting PointGroups
Granitic intrusions Mafic intrusions
Harbour main Group
Signal Hill and St.John’s Groups
PALEOZOIC
LA
TE
PR
EC
AM
BR
IAN
SIMPLIFIED MAP OF PRINCIPAL STRUCTURESAND STRATIGRAPHIC DIVISIONS
