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MAP SYMBOLSGeological contact, defined

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2006-1

Base Map Information

Base map produced from digital TRIM (Terrain Resource Inventory Management) 1:20 000-scale topographic database, British Columbia Ministry of Environment, Lands and Parks.

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82

45

77

25

21 76

18

75

38

0

3774

D AB

A!

!

!

! A

D !

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D

2

4

!

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B

202.2 (±0.9) Zr


eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

eeta

50° 18'

78

79

80

76

74

75

77

81

73

Mainlinterc

Mainlvariab

Mainlepicla

Mainlmudsminor

Plagioaphan

Interblapilli sandsphrea

Interbeddedbuff to grey-breccia, lithituff, lapilli tuand volcanicmudstone, s

Medium greto non-calcagrey-green l

i l t

Carnian to Rhaetia

VOLCANICLASTIC

PARSON BAY FO

Rhaetian to Hettan

lJLx

lJLmf

lJLmb

lJLv

lJLvs

lJLs

uTrP

TrJBvs

y bimodal basaltic and rhyolitic lava flows and pyroclastic deposits with subordinatecalated volcaniclastic and sedimentary lithotypes

y basaltic to andesitic volcanic breccia of epiclastic and pyroclastic origin, and bly reworked lithic-crystal tuff; locally includes fine-grained sedimentary interbeds

y basaltic to andesitic pillow breccias and hyaloclastite with minor intercalatedastic deposits; locally includes minor pillow lava

y sedimentary strata including impure limestone, calcareous to non-calcareousstone, shale, siltstone, sandstone and tuffaceous equivalents; may includer intercalated volcaniclastic breccia

oclase-megacrystic basaltic to andesitic lava flows; locally intercalated withnitic and plagioclase-phyric flows

bedded volcaniclastic and sedimentary strata; includes lithic and crystal-lithic tuff and reworked equivalents, pyroclastic and epiclastic volcanic breccia,

stone, siltstone, mudstone, impure limestone, and minor debris-flow and atomagmatic deposits; may include minor lava flows

d volcaniclastic and lesser sedimentary strata (predominantly submarine): -green, thin to very thickly bedded, calcareous to non-calcareous, volcanic ic and feldspathic wacke, siltstone and limestone, locally coralline; lithic-crystal

uff and reworked equivalents; and minor vitric tuff, pebbly sandstone, siltstone,clastic debris-flow deposits; organic-rich facies include carbonaceous shale,siltstone and limestone, locally coralline

ey to black, laminated to medium bedded impure limestone, calcareousareous mudstone, siltstone, and shale, locally intercalated with minor lithic wacke, feldspathic wacke, lithic, crystal and vitric tuff and reworked

d l i l ti b i d bbl d t l t d

an or possibly earliest Hettangian

C-SEDIMENTARY UNIT

RMATION

ngian


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64

27

42

F il d i ti

Volcanic flow lamination, inclined, vertical

Bedding, facing known, inclined, vertical

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Plutonic flow lamination, inclined, vertical

Lineation, inclined (slickenfibres on fault plane)

Lineation, horizontal (slickenfibres on fault plane)

Thin (<40m) sliver of Quatsino limestone adjacent to fault

Reverse fault, inferred (teeth on upper plate)

Unconformity, approximate

Unconformity, inferred

Unconformity, defined

Reverse fault, defined (teeth on upper plate)

Radiolarian locality (age code as below)

Minor fold with dip of axial plane

Macrofossil locality (age code as below)

GSC Conodont locality (age code as below)

Conodont locality (age code as below)

TlC(W)GSC Macrofossil locality (age code as below)

Dike, inclined, vertical

Volcanic lamination/welding, inclined

Limit of mapping

Minor fold with plunge

at base of Parson Bay FormationThin (<40m) unit of Quatsino limestone

B

Steeply dipping fault, inferred


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42

Appdeo

40 ann

JeleSouCan

MullGeo

Mulland VanCan

Magnetic Declination

NNM

proximate mean magnetic eclination 2005 for centre of map area: 19 degrees

minutes east, decreasing nually 12 minutes per year

Selected References

etsky, J. A. (1976): Mesozoic and ?Tertiary Rocks of Quatsino nd, Vancouver Island, British Columbia; Geological Survey of ada, Bulletin 242, 243 pages

er, J. E. and Roddick, J. A. (1983): Alert Bay - Cape Scott; ological Survey of Canada, Map 1552A, scale 1:250 000.

er, J. E., Northcote, K. E. and Carlisle, D. (1974): Geology mineral deposits of Alert Bay - Cape Scott map area, couver Island, British Columbia; Geological Survey of ada, Paper 74-8, 77 pages

North American Datum 1983 (NAD83). Universal Transverse Mercator Projection (Zone 9). Elevation in metres above mean sea level. Contour interval 100m.

128° 00'

70 72 73 7471 575000

68

71

72

5570

000N

66

67

69

((

(

((

((

(

(((

(((

lJLm

ENTRANCE

BROOKS

BAYRock

Gould

Point

Rocks

Heater

Morris

Hughes

Rock

5D

77 80 81 82 83 80E 76 7978

600

800

00

400

400600

200

(((((

(

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INLETKLASKISH

Klas

kish

Basin

BonnerPoint

Islet

Sapir

ConeShields

257

258




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52

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127° 48'

88 89 90 91 928584 86 87

600

40020

0

600

400200

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((

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(

(

(

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(

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330

228

334

333

332

265








Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

Klaskish

127° 36'

9997 98 600 0193 9694 95

1000

400

600

800

(

lJL

(Not Mapped)

331

001

002

182





06605000E

68

66

67

69

71

72

0402 03

5570000N

Aphanitic tocommonly asuccession;

Medium to plimestone; mlayers and a

equivalents debris-flow dcontains abu

Volcaplagioof phrlocally

Carnian (possibly KARMUTSEN FOR

Carnian to Early NQUATSINO FORM

VANCOUVER GROUPPER TRIASSIC

uTrQ

uTrPv

uTrKfo plagioclase-phyric and locally plagioclase-megacrystic basaltic lava flows, amygdaloidal; predominantly subaerial flows in the upper part of the may include minor pillow lava, pillow breccia and hyaloclastite

pale grey, thinly bedded to massive micritic limestone and locally bioclastic minor silica replacements and chert nodules; rare laminated interbeds, ooliticalgal structures; locally fossiliferous; unit is very thin (<40m) on the West Coast

and volcaniclastic breccia, and rare pebbly sandstone, conglomerate and deposits; calcareous facies locally contain colonial coral horizons; shale locallyundant bivalves

anic lithotypes within the Parson Bay Formation: mainly aphanitic to clinopyroxene-oclase-phyric, basaltic waterlain breccia and tuff; includes lithic tuff and tuff-brecciareatomagmatic origin; minor pillow lava and hyaloclastite; and rare subaerial flows;y interbedded with lithic wacke and typical Parson Bay sedimentary rock types

latest Middle Triassic at the base)RMATION

NorianMATION

OUP

.........................

ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ167.4 (±

160 (±1

d

g



(no label indicates age indeterminate)l lower

Plagioclase-megacrystic basalt/andesite, LeMare Lake Volcanic Succession

intercalated with basalt near the top of the successionThin (<10m) lens of grey intra-Karmutsen limestone

Ar/ Ar date (Ma, 2 sigma error); Bi, biotite

Road (dirt)

MINFILE Locality

Outcrop Examined

Outcrop too small to show at map scale

U-Pb zircon date (Ma, 2 sigma error)

Plagioclase-megacrystic Karmutsen basalt

Fossil age designation

(R) Rutherfordi; (C) Cordilleranus; (S) Suessi

S Sinemurian; P Pliensbachian

H Hauterivian; B Barremian

(Di) Dilleri; (W) Welleri; (K) Kerri;

T Late Triassic; J Jurassic; K Cretaceouse early; m middle; l late

C Carnian; N Norian; R RhaetianLate Triassic:Jurassic:Cretaceous:Ammonoid Zones:

.........................

ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ±1.1) Zr

1.4) Bi 40 39

042d

g



G. T

Nixon, G. T., HamFriedman, R. M.Tozer, T. and CoNorthern VancoResources, Geo

Digital Cartography

G. T. Nixon and R. D. M. Rayner

T. Nixon, M. C. Kelman, K. A. Johnston and R. D. M. Rayner

Data Compilation

Recommended Citation

mmack, J. L., Hamilton, J. V., Jennings, H., Larocque, J. P.,, Archibald, D. A., Orchard, M. J., Haggart, J. W., Tipper, H. W.,

ordey, F. (2009): Geology of the Mahatta Creek Area,uver Island; B.C. Ministry of Energy, Mines and Petroleum

oscience Map 2006-4.

ENCE MAP 2006-4 uTrP Geology of the Mahatta Creek Area...

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