Geology of the Holberg - Winter Harbour 127° 48' Utrk Area, Northern Vancouver Island

BC Geological Survey GEOSCIENCE MAP 2006-3

71 72 73 74 75 76 77 78 79 580000E 81 82 83 84 85 86 87 88 89 590000E 91 92 24 24 Geology of the Holberg - Winter Harbour 127° 48' uTrK Area, Northern Vancouver Island

23 23 NTS 92L/12W, 102I/8, 9 ( B ( G.T. Nixon, J.L. Hammack, V.M. Koyanagi, G.J. Payie, L.D. Snyder, A. Panteleyev, N.W.D. Massey,

47 48 49550000E 51 52 53 54 55 5657 58 59 560000E 61 62 63 64 65 66 67 68 69 570000E 12 22 ( 22  (( ( ( ( ( SS 67 14 Ñ( D.A. Archibald, J.W. Haggart, M.J. Orchard, R.M. Friedman, T. Tozer, SS  ( uTrP Ñ Nahwitti

S TT ( Ñ( (Not Mapped)

128° 12' tr TT (© 5 uTrK

a RR ! 54 128°( 00' © ( ( uTrK

n ! 5 ( 006 b AA 54 ( ( ( ! y N H.W. Tipper, T.P. Poulton, J. Palfy, F. Cordey and D.J. Barron d NN lmJL 274 a d 28 40 35 ( ( 5 ( BB 5 d h 0 ( BB ( © w Batholith 0 YY it ( ! ( NN ti 21 ( ( AA 21 ( ( HH (Not Mapped) lJL ( uTrQ HHWW GEOLOGY ( ( III ( er uTrK

( TTTT Riv by R ( TT (

William d i ( ( (( III 5620000N ve ( ( ( ! r ( ( 007 ( G.T. NIXON, J.L. HAMMACK, V.M. KOYANAGI, G.J. PAYIE, L.D. SNYDER, A. PANTELEYEV, N.W.D. MASSEY, J.V. HAMILTON, D.J. BARRON (BC Geological Survey) lKL ( uTrP JIqdi-qm ( ( 24 ( ( J.W. HAGGART (Geological Survey of Canada), D.A. ARCHIBALD (Queen's University) Lake uTrK ((

FF 2 ( 5620000N Ñ (Not Mapped)

AA ( 36 (Not Mapped) uTrQ UU ! TrJBvs

( (

( LL ( PALEONTOLOGY GEOCHRONOLOGY 22 uTrK TT 35 0 0 75 ! Ñ 90 0 40 uTrQ ( ( ! 30 2 2 ( ( 165.6 (± 3.6) Hb d . ( by by ( 5 181 (( 142 19 Ñ ( 6 d 19 ! ( ( ( (! ( d ( 00 d ( ( ( d 00 ( ( Ñ 013 Goodspeed ( 194 M.J. ORCHARD, T. TOZER, H.W. TIPPER, T.P. POULTON D.A. ARCHIBALD (Queen's University) uTrP 3 Ñ 2 4 Goodspeed uTrP © 4 0 d ( ( ( ( 500 d 162 ( ( 0 0 (( (( uTrK 0 ( 20 ( (( d J.W. HAGGART (Geological Survey of Canada) R.M. FRIEDMAN (The University of British Columbia) 2 ( 0 6 (( 143d Brink ( ( ( © 5? uTrKls 42 TrJBvs? (( Porphyry JIdi 79 FF ©

6 ( d AAUU 77 Kains 22 0 ( ( UU J. PALFY (Hungarian Natural History Museum)

! ( LL Lake 0 ! 60 ( ( uTrQ LLTT d © 1 ( (

lJL ( 200 ( ©

Ñ15 ( (( ( 24

( 20 ( ( ( uTrK Nahwitti 20

( !( lmJL ( 2 k

( ( ( ( lmJL ( TrJBvs ( B d ree

( JIpo-qdi uTrK 197d ( C ( d D

d JIdi-qm 14! !

29 lJVx ( ( ( Lake ( ( ((

( !( 20 008 ( ( ( ( ( ! Ñ ( ( ( ( 26

! ( ( 46 4 ( WW ( 25 ( ( ( s 25 02 WW (( ( ! ( uTrP n

! 244 (( ( i

lJLv uTrP 74 ( ( (( (( ( ( Ka d 50° 42' ( uTrP 3® III TrJBvs ( ( ( 196 ( uTrK ( D

uTrP LL ( 76d ! it ( ( WW 17 ( D uTrQ d 245 ( ti (( 17

( ! III  kilometres

IIIAA 37 ! 5 6 AA ( AA 14 ( ( © k 242 0 !

( uTrPv ( ( JIdi-qm ( ! NN d ( ( ( 2 e d

0 MM Ñ k ( ( © 192

(( ( ( MM 009 Ñ uTrQ ( uTrQ e (d5 69 ©((( ( 45 OO 50° 42' 3 ( ( ( d OO

45 e OO

( ( ( 21 uTrK ( 55 r d( ( 20 Scale 1:50 000

( ( ( G e d uTrQ KK

! ( d C © d r

( ! ( ( ( d ( Ri 90 ( (( 14? AA

( uTrK o ( ! ( v AA

!25 38 e ! (

0 r C

! ! 55 241 uTrQ

62 ( ( o ! 14 ( NN (

( 0 ( d 37 NN

1 14 45 30 ( d 78d 49 ( ( B Ñ ( ( ÑÑ85

0 ( ( 2 ( 14

0 42 s ( ( ( 176 (± 3) Hb ! ( ( uTrQ AA  2 ( p ( 69 2

TrJBvs ( 2-3 ( Ñ ! ! ( ! ( 253 45 ( ( ( e ! uTrP 14 

55 Ñ ( uTrK e ( ( r ( ©( ( ( 55 ! ! © !

! d ( e . © 4 ( ( 20 !( (

( 72 ( 19 lJVx? ( ( ( ! uTrP d d30 ! d 76 75 90

16 15 ( p d 16 B d 32 ( ( lmJL ( ( . d ( ! ( LAYERED ROCKS INTRUSIVE ROCKS

( l ( 40 (( ( (

37 ( ( d( ( ( uTrP

( e 243 12

(( 160-170 15 a( 75 ( 22 165.1 (± 2.8) Hb ( 5 (  21

( 85 ( 72 e 45 © (! 70 (

( !30 ! ( ( A (

! ( ( ( A ( 30 ( ! TERTIARY (?Neogene) ! 2 ( (

! ( 5? ! 2 4

62 É( ( 4

! 

! 37 uTrP ( ( lmJLm 0 66 D ! UPPER CRETACEOUS

( ( 165 (± 14) Hb. JIdi-qm 0 6  ( !

uTrPv ( 57 ( 6 32 32 ©

( ( lmJL 00 ( D ( ( 13 ( 25 15 ! ( 82 ( B ( ! ( 38 ( !

( ! QUEEN CHARLOTTE GROUP EQUIVALENTS (IN PART) Rhyolite sill complex possibly equivalent to Alert Bay Volcanics.

! ( ( ( ( ( JIdi-qm ( ( uTrP ( 80 Tif

( ( 4 ( ( (( 40 (

0 12 ( 30 10 ( ( ( !

15 ( ( 0 iver 63 Ñ ( 170 (±2 2) Sc ( ( 54 15 ( R 2 74 ( Cenomanian or Early Turonian to ?Santonian ! 88 52

Ñ uTrP 4? ( ( 173 (± 2) Hb 2 ( !

( R ( . ( S 12 14 i ( A (( 65

20 2 4 v ! 42 ! a ! 0 75 ( uTrP FF n lJLf 0 © e 35 ( FF ! ( BLUMBERG FORMATION

( uTrPv 16 ( Ñ ®( r 79 240 ( ( AA EARLY TO MIDDLE JURASSIC

( Ñ(( ( ( ( 2 26 TrJBvs 82

5 uTrQ ( ! d 65 UU

( Ñ ( ( 2 ( UU e 40 B 2 (

lJL 13 ( ( 70 !

e © ! d Hushamu(  ( ! LL

Jo p © ( ( 60 ( ( ( (( 44 LL Massive to thinly bedded lithic to arkosic wacke with minor pebble to

B se © 15 Mount ( (( TT

37 f s ( ( TT! 239 44 1 ! 5 ( 60 62 ( ISLAND PLUTONIC SUITE

( 18 0 d uTrK? ( ( ( ( ( ( 0 D Lakes uKBsn

D 0 o ( McIntosh((

D ( River 30 ( ( ( ( ( ( d cobble conglomerate. o ! 45 ( ( ( d

14 33 (( D 29 ( ( ( ( 60 A( ( 14

00 G 2 ! ( 77 ( Medium to coarse-grained, equigranular granitoid rocks and porphyry; ! 62 1 25 ( ( ( ( ( ( ( ( JIpo ( ( ( (( (( H 400 2 ( ( A u includes hornblende +/- biotite-bearing diorite (di), quartz diorite (qdi), ( 30 ( ( ( s JI 30 ( ( D60 D 75 h a W ! ( (( ( (

y 42 ( lmJLm 185 m ( Massive conglomerate with minor lenses of coarse-grained lithic wacke. plagioclase +/- hornblende porphyry (po) and minor quartz

a ( B50 D( u 226 mJPf1 a

( d n uKBcg

B ! uTrP ( d 2 lmJLm monzonite/monzodiorite (qm) and granodiorite (gd). ! 28 D ( o

( !

54 30 k (

uTrK ( ( mJPf2( D a 28 ( ! J A

13 75 en uTrP? ( ( mJL/Pm ( n 13

( ( s lmJL ( 79 52 a

e ( ( ( Hushamu 35 ( Minor Intrusions n ! 85

lJLf ( FF ( ( ( ( (

TrJBvs? B

f ( AA 38 ( ( 177.0 (± 6.4) Hb ( ( ( ( D Cenomanian to ?Turonian e ( ! ( ( ( ( ( ( ( s UU ( 36 . ( ! 30 (

o UU ( ( ( ( ( ( É 169.6 (±0.4) Subvolcanic basaltic to andesitic, aphanitic to porphyritic intrusions: C ( 25 ( Pluton É( ( J ! Pluton ( ( LL ( ( ( (( ( ( SHALE UNIT r ( TT 010 ( ( 32 JBi e TT ( ( mJLm ( ! d: diabase; dp: plagioclase-phyric diabase. e d TrJBs !17 ( ( ( ( k ( (

37! ( ( ( (

HOLBERG ( ( ( Dark grey, calcareous to non-calcareous siltstone and impure limestone interbedded

12 ( ( ( ( ( ( JIdi-qm 12

8 ( ( 51 ! JIdi-qm ! ( 3 JIdi ! 42 ( ( ( ( uKus n Ñ 1® ® ( C ( ( ( with subordinate wacke and minor pebble conglomerate.

a ( 22 ® ( (( ( ( (

S Kelley ( ( 3 50 ( ( ( r (( Subvolcanic rhyolite dikes, sills and intrusive complexes. e D

40 D ! ! 14 ( 0

! lJL ( ( ( 50 ( 131 JBif 64 ( 40 ( 70 e (

Island 28 ( ( Mount uTrQ ( 30 ( ( (

( ( ( ( ( ( JIdi ( ( k ( ! (

( Ñ 5 ( A

( Ñ ! A ( d 3

9Ñ ( lJLm ( ( ( C

! 33

d © ( 56 D ( ( ( ! d B

( 5 ( 40 ( ( (( ( ( ( r (

33 35 Hansen 0 ( ( ( ca.161 Al ( ! e LOWER CRETACEOUS

! 72 . (

(( ! ( .( ( ( e

27 30 ( ( lmJLm ( lmJLm

11 33 5 ( ( ( A k 11

! 0 5© 87 ( ( 34

25 !

0 uTrP 4 ( Late Valanginian to Barremian

! (

TrJBvs uTrK ! ( ( lmJLm ( ! 57 uTrQ 70 ! D

D Radome 4 ( ( ( ( 0 ( ( ( (

0 34 200 ( ( ( (

9Ñ lJLs 12 ( 44 33 ! ( ( ( (( ( LONGARM FORMATION EQUIVALENTS 9Ñ ( ! ( MAP SYMBOLS

( ! 38 47 (( ( ( ( 45 ( 271 5610000N ( ( ( A ca.160-167 Al

( 2 ( ( ( D

30 0 ( d ( Pemberton (

D 0 # d ( ( ( ! 40 9 4 Thinly bedded to massive sandstone, siltstone, mudstone, pebble conglomerate

( 2 9? ( ( ( 9? 9 0 ( D . Geological contact, defined D ( .( lKL 0 mJPf1

21 30 50 10 11 ! ( 400 ((

Ñ( Ñ ( 70 ( and minor coal; locally fossiliferous.

lJLf Ñ 12 2 11 Hills ( Ñ 14 !

( ( ( 0 (

! ( (

( 2 ÑÑÑ ( ( ( 0 ( ( Geological contact, approximate Ñ (16 D

lJL ( D ( lJVx ( 20 Ñ 30 54 ( ( (

70 Ñ Ñ 33 ( ( 76 ( ( 00 5610000N ( TrJBvs 2 ! ca.145-150 Al 2 60 44 ! 8

! 25 14!

®( 14Ñ 22 4-5 (! . D

8 ( ( ® ! Ñ (( ( 82 ( . ( Geological contact, inferred

( ! HH D 308 ! HH . (

D 30 JIpo HH . k OO A

Ñ lJLs? Ñ © OOLL ( ca.145-150 AlD d

e © 4 LL 2 ( ! (

( 35 80 BB 46 45 24 ( 57 Wanokana UPPER TRIASSIC (CARNIAN) TO MIDDLE JURASSIC (MID-BAJOCIAN)

( e © EE

! © EE Unconformity, approximate

54 28 48 r RR ( ! D ( 4 (D ( d GG ( !( ( 46 d( !

( 0 ! 4

68 D C ( ( 80 ( D 42 ( 0 0 TrJBvs uTrP 34 ( ( (( 2 18 lJHs ( ( BONANZA GROUP ( ( 

( ( ( 0 lJLm ( ( 09 0 ( G uTrK 67 ( ( ( 35 Pluton 09 Unconformity, inferred

2 0 ( P 1

0 47 lJLm ( ( l 00 lmJLm ( 30 0 ! ( e ( e ( ( 32 ( D (

( lJL lJVx lJLv g r 88 90 270 ( 15 D d 89 Rhaetian or Hettangian to mid-Bajocian (Holberg - Winter Harbour Area) 17 47 uTrQ ! ( ( 47 d ((

( a u uTrQ 2 ( 88 d (

D 35 High-angle fault, defined (block on downthrown side if known) D

( 16 t p ( 400 D 2 ( D

Mt ( ! 10 ( t ! (

( ( e 2 d (

17 ( D 0 ( ( ( 35! ( m ( 55 JIdi-qm

D ( ( 42 ( ( (( LEMARE LAKE VOLCANICS (subdivided by lithotype)

( ( 0 ( (

48 29 ( ( ( 14 High-angle fault, approximate

! !

( ( ( ( ((((( 32 ( ( uTrK 5 D 23 87  (

! ( (

26 ( Brandes ( ( ! 28 Age designation: mJ, Middle Jurassic; lmJ, Lower and/or Middle Jurassic; lJL ( 55 31 ( ( ( (267 ( ( ( ! D

! ( ( 28 30 E

( 43 ( 2 ((( ( d

(( (d 64 2 ( ( ( lmJLm d High-angle fault, inferred

( ( ( ( d (  0 ( lJ, Lower Jurassic; TrJ, uppermost Triassic - lowermost Jurassic

08 ( ( ( 74 (( ( ! 0 ( D ( (( ( ( 08

2 D ( 1 ( C ( ( D

Porphyry ( A 0 Porphyry D ( !

0 ( © r ! ( ( 70 lmJLm ( 48 Reverse fault, approximate (teeth on upper plate) ®2 24 e uTrQ ( ( 58 ( 169.1 (±0.5) ! uTrP uTrQ C e ( ( 35 uTrQ ( ( 45 É (

( ( 45 TrJBvs r k ( 24 FFAA ( e ( ! AA

f(( ( ! UU lmJLm

( e f f( UULL D36 ( Undifferentiated basaltic to rhyolitic, predominantly subaerial lavas and pyroclastic rocks including Reverse fault, inferred k # ( 247 f ( ( LLTT 33 37 ! uTrK ( ( ( TT d ( lJL g ( ( ( ( 269

50 ( JIpo ©4 d ( ( (( ( mJLm 0 ( L ash-flow and rare airfall tuffs and reworked equivalents, minor pillow lavas, breccia, hyaloclastite n ( (f( ! 10 (

JBid i ( 48 ( f ( 50 Axial trace of anticline n ( uTrK mJPf1 and pyroclastic surge deposits, locally intercalated with marine to non-marine, volcanic

( n ( ( (( ( ( ( ( ! mJPf1

(  ( f( ( ( ( f( ( o ! ( ( ( (( (( f ( ( E

07 ( ! ( uTrQ 34 ( ( ( ( 07 conglomerate, sandstone, siltstone, mudstone, impure limestone and localized debris-flow deposits. Axial trace of syncline

R Mount ( (

D ( (

30 ( ( ( ( ( 40 ( ( ( (

51 lJL ( ( ! ( ( ! 30 18 30 ( ( ( ( uTrK f 38 D 2 ( ( ( ( ! ( ( ( ( ( 78 ( (( uTrQ 25 Limit of mapping ( Brandes Ñ ! ( f 42( ( ! ( Ñ14 ( ( ( ( ( ( ( ( ( ( lKL

Cape 32 ( ( f ( (( ( (( 54 50 ( Ñ f A ( ( Mainly rhyolitic or dacitic to rhyolitic lavas and/or pyroclastic rocks, including flow and

lJLf 32 ( 9 ( 14 ( (( 35 Bedding, inclined, vertical Palmerston ( ( ( ( ( (( Lf

! 9 ( H pyroclastic breccias, welded to non-welded crystal-lithic lapilli tuffs and rare airfall tuffs; ! #

( ( uTrK o ( Ñ TrJBvs ! lb D Ñ ( 57

D 300 TrJBvs (! TrJBvs 20 uTrQ erg 50° 36' lJL 43 Ñ !

( Ñ 5 86 10 37 ( ( ( may include thin interbedded sedimentary deposits. 0 ! Primary flow lamination in volcanic rocks, inclined, vertical

06 ( 55 0 ( 21 0 ( ( ( 06 D E !

! 40 ( mJLm? !

> 22 ( ! 2 0 46 TrJBvs?

35 ( 0 (

! ( (

( ! 54 In

(( 0 (

62 ( ( ! B ( let Mainly basaltic to andesitic lava flows with minor intercalated volcaniclastic and

D ( ( uTrQ lJLs Welding, inclined lJL 0 35 (

28 43 ( ( lJLm ( ! ( ( k

0 ( ( ee 0 ! Lm ! >

50° 36' > ( ( lJLm? ( ( r ( 55

( 1 ! ( 28 ff C 0 sedimentary lithologies similar to Lvs; locally includes minor pillow lava and breccia. 52 ! 1 64

40 ( 80 45 ( ( ! 43 65 100 P ( ( 28 ! ( ( ! 2 lKL lJL 12 ( 48 lJVx ! ( 15 Cleavage, fault-related, inclined ( 43 E

( 12 ( Jules 15

D ( ! ( ! uTrP 54 ( uTrQ

5 D ( ( 34 ( 40 lJLp ( (( 47( Ñ(

33 (( ( 2 Ñ Ñ 8

( ( ( ( !( 80 ( ( ( (( Lineation (slickenfibres on fault plane) ! 05 ! ( ( 9 05 Mainly basaltic to andesitic pillow lava; may include pillow breccia, hyaloclastite and ( !

! k ( TrJBvs? 51 46 55 ( ( 37 ( ( ( 47 ! Bay

lJLf ( ( 2 c ( ! Ñ

a JBidp D ( ( lJL? ( ( ÑÑ( ! ( ( Ñ 30

( lJLm ( © ! Ñ Michelsen Lp

j 56 48 (! 38 uTrQ ©2-3 ( ( (

c ( 40 ( (  reworked equivalents. 2 !

Ñ ! a ( ( ( ! 8? (

A 3 ((( ( way 37 ( ( ( ( Ñ Ñ ! Plunge of minor fold axis

Ñ 32 a Ñ ! 80 Ñ Ñ 2 Point

3 M ( (( 70 th uTrQ TrJBvs ! 45

30 lJLm Ha ! ( 38 ( lJLs ( D  ( !

( lJLm ( ! 49 ( (

( ( ( ( ( 32 ( ( ((4 65 ( 70

( lJVx lJLp (

( 12 uTrP (( 5 ! ( ( ( ( ( Plunge of primary flow fold axis uKBcg TrJBvs? !

! ! ( (

R a f t ( ( 200 ( ( Ñ 80 63 !( TrJBvs? lJLp? 4 9 uTrQ Mainly basaltic to andesitic volcanic breccia of epiclastic and pyroclastic origin, and

( ©( ((  2 ( 36 50

R ( ( ( 25 27 4 ( 40 ( !

i ( lJVx lJVx ( ! 24 26 (  Lv

v ( lJL 28 ! 14 ( ( 227 TrJBvs? uTrP

C e ( ( ( 2 ( ( ( 6? 04 variably reworked lithic-crystal tuff; locally fine-grained sedimentary interbeds.

04 r ( 32 (( 00 Ñ ( Minor fold with dip of axial plane ! !

32 D (( 48 ( 45 uTrQ (Ñ ( JIdi lJL? C o v e ( lJVx  (! Ñ12 38

( SS ( D SS lJLm ! 40

( SS A (

! PP !31 ( Ñ 50

! 100 EE 45 80 ( (75 15 ( 14 (

NN # ( ( 34 ( Primary flow fold with dip of axial plane

28 ! 16 CC 50 ( ( ( lJVx ! CC ! (( ! lJL?

(! ( lJVx EE 

lJLm ( 46 ! EERR 50 © ( ( ( 40 Interbedded volcaniclastic and sedimentary strata, includes lithic and crystal-lithic 32 ( 62 RR !

RR A uTrQ 44 4-5 16 ( ( ( ( lJLm ( ( ! ( Lvs

I ( ( ( 0 ( 44 ( lapilli tuffs and reworked equivalents, pyroclastic and epiclastic volcanic breccias,

! (( lJLm 0 ! Dike, inclined, vertical ! ( 43 ! 4 ( ( ( ( ! ( A ( ( B

( ( lJLp ( ( 40 TrJBvs ( ( !

( ( 76 ! sandstone, siltstone, mudstone, impure limestone, and minor debris-flow and 45 ! 03

03 ! 28 ( ( 5

38 0 30 phreatomagmatic deposits; may include rare lava flows. 75 ( 4? 60 ! Ñ Macrofossil locality (with indicated age) ( ! k 34 ( 38 ( 0 ( e ( ( 0 F ! 4 Commerell ( e © ( ( 2 0 ( ! r ( 1 Late Cretaceous 0 55 C 6 © ( ( ( 25 Mainly sedimentary strata including impure limestone, calcareous to non-calcareous

Point ( © lJLm ! Ls lJVx ( ( 0 2 Early Cretaceous (Hauterivian) ( ( 0 mudstone, shale, siltstone, sandstone and tuffaceous equivalents. ( ( ( 4 ( ! 27 (

2 27 lJLm ( ( 3 Early Cretaceous (Valanginian) 0 (! uKBcg

02 I 0 36 ( 02

! 2 ( lJLm ( (

00 d (( 4 Early Cretaceous

Topkn Moore r 39 D 0 ( ot ( D ( BB ! 46! a (( lJLm 0 ( n ! 50 Lake e 50 ( ( 6 ( Middle Jurassic (mid-Bajocian) 5 Late Jurassic - Early Cretaceous

( RR ! ( ( ( D lJVx

OO 400 ( ( ( Lake lJBm lJLm 43 6 Early or Early - Middle Jurassic

WW 35 !20 ( Pemberton Hills Rhyolite C WW 35 42 ! (

uKBsn ( ( ! (

A82 B

(( ( ( ( r 24 ( ( NN !( ( 44 7 Early Jurassic (Late Pliensbachian - Toarcian) e

( !( 200 ( A

III ! (

IIINN !50 ( 35 v ( NN ( ( i 40 D 01 01 FAFA D 8 Early Jurassic (Sinemurian - Pliensbachian) ( FAFA 48 D ( Rhyolitic lavas and ash-flow tuffs with minor intercalated epiclastic deposits; subunits

( GG 67 ( R

D( Ñ G ! UU ( ( 51 44 ( ( ( mJPf1/2 ( 15 ( !

9 a LLTT 40 45 ( 1 and 2 may represent separate stratigraphic units separated by basalt-andesite lavas 9 Early Jurassic (Late Sinemurian)

( 28 ( !73 l TT ( ( ((

lKL a ( ( D ( D

( ( ( to (mJL/Pm) or the same unit repeated by intrusion/faulting in the Hushamu Creek valley.

D lJL 55

lJLm ( ( Ñ3? ( 28 46 10 Early Jurassic (Early Sinemurian) Ñ 5600000N 4 ( (( (

( A 37 ( 21 ( ( 0 ( (

( 0 ! ! ( (

2 57 ( ( 11 Early Jurassic (Middle Hettangian)

0 ! ! (

0 (

(! Hettangian (or possibly Rheatian to Sinemurian) (Holberg - Winter Harbour Area) lJLm 77 ( 12 Late Triassic (Late Norian) ! ( ! ! 43 ( ( ( ( ( ( ( ( (

34 JBif ( ( (

( ! ! ( (28 JBif Victoria Lake Megacrystic Basalt 13 Late Triassic (Late Carnian) A 40 10 ( ( 5600000N ( 25 20 38 ( 40 ( ( ( ( ( (( ( D

D ( ( ( ( ( ( 28 ( C ( lJL 14 Late Triassic 30 ( ( ( ( ( (

54 ( 75 ( 27 ( ! ( ( ( ( o lJLf ( r ! ( ( ! ( 50 36 ( ( (( n D ( e ( ( ( Plagioclase-megacrystic basaltic to andesitic lavas locally intercalated with, and laterally

! !( ! ( ( 30 (( ( i

O Ñ ( 0 16 e ( ( Ñ 9

37 ! r

( 0 ( ! D 3 k 2 ( lJVx Ñ GSC macrofossil locality (ages as above)  65 50 uKBcg 6 p ( Ñ

40 ( 3 ( ( equivalent to, aphanitic and plagioclase-phyric flows near the base of the LeMare Lake

(( (( Ñ ( ! ( ( ( (( o ( 38 ( ! ( ( D lJLm ( ( 99 (( 35 ((Ñ( ! ( ( ( ( K ( 99 Volcanics; locally forms pillow lavas (LVpx). ( lKL 3 ( ( ! (( 25 ( ( ( 2 Conodont locality (with indicated age)

Ñ( ( ( ( ! C Ñ ( 0

Ñ( ( 

( !34 55 0 20 ! !

50 2 ( Topknot ( ( ( ( 4 1 Late Triassic (Rhaetian) ! ( ( ( D 60 ! ( 0 ( ( 38 ( ( 0 ( Tif Hettangian

Point lJLm ( ((( A ( 75 lJLm (

( 38 ( ! ! A 10 ! ( ( 2 Late Triassic (Late Norian) ( ( h ( E ( Wedel 38 w 15 ( HOLBERG SILTSTONE

( ! ( h uKBcg 3 Late Triassic (Middle Norian) 35 Island ( ( i ( # 98 20 ( ( ! ( ( ch ( ( ( 98 0 ( ( ( ( ( ( ( ( ( (

( k ( ( ( a 4 0 4 Late Triassic (Early Norian) lKL ( ( o N

( e 4? 65 (( 00 0 (

( ( e ( ! 46 lt 2 ( Dark grey, weakly to non-calcareous siltstone and fine-grained sandstone; locally

lJLm r o

( Ñ4 Ñ( ( lJLm ( 55 ( o 5 Late Triassic (Carnian - Late Carnian)

A C r lJHs

( ( Ñ I ( 3 ( A d fossiliferous; only known exposures confined to the south shore of Holberg Inlet.

( ( ! n !

3 3 A( le ( s ( ( ( 6 Late Triassic 3! 3 20 FF ( Ñ ( ( 50 t ( 34  Ñ t

( 40 r ( B

AA ( o (

( AA ! 44 ( 65 uKBcg ( 3 44 m i lJLvs 50 Ñ 52 ( ( s 5 N UU Ñ ! ! (

97 ( LL L ( 40 ( ( 6 ( ( 97 ( ( ( Ñ Rhaetian to Hettangian or ?Sinemurian (Holberg - Winter Harbour Area) ( ( 24 lJLm ! (( TT o (( ( 12 ( e ! A ( ( 1

39 l 52 15 t ( ! Radiolaria locality (with indicated age)

( n ( 47 2 (( ( ek ® 33 a o 43 0 lJL ( ( e VOLCANICLASTIC-SEDIMENTARY UNIT (( ( ( 0 ( r ( D

w es ( ! 65 ( ( C uKus ( D D e D ( ( lKL ( ( 1 Early Jurassic (Hettangian - Sinemurian)

(D K L ( (

128° 12' (48 ( (( (WINTER 25 ( (

( ( 55 (

D 57 (( ( ( ( k Ñ1 Interbedded volcaniclastic and lesser sedimentary strata (predominantly submarine): 2 Early Jurassic ! E e ( HARBOUR ( A

65 52 ( ( 74 ! d e TrJBvs ( 28 D D ( buff to grey-green, thin to very thickly bedded, calcareous to non-calcareous, volcanic

96 40 24 93 ( r 96 3 Jurassic 46 D 60 ! 53 0 ( C

47 48 49550000E 51 52 53 54 55 56 57 ! ( breccia, lithic and feldspathic wacke, siltstone and impure limestone; lithic-crystal tuff,

lJLf 26 (A ( ( 4 Late Triassic (Late Carnian - Middle Norian) ( D 48 48 Cr ! ( ( ! (

(( ( ( lapilli tuff and reworked equivalents; and minor vitric tuff, pebbly sandstone, shale and

66 9-10? 65 ( 44 ee !20 D !

Ñ( D ! (( (

Ñ TrJLf k B volcaniclastic debris-flow breccia. ( lJLf ( D ( lJL ( . Ar40/Ar39 hornblende (Hb) date (Ma, 2 sigma error) ( ( 56 ( ( erg ( 35 13

!!( ( ( ! ( 167 (± 6) Hb ( !3 lJLvs 55 (( ( ( mb

41 ( ( ( ! ( u

Ñ t 34 ( ( Robson 50° 30'

# Bl 95 e ( ( 95

40! ( (

l ( 49 ( ( ! (( Cove (late) Early Norian to Rhaetian or ?Hettangian (Holberg - Winter Harbour Area) . Ar40/Ar39 mineral date (Ma, 2 sigma error);

! D A ( n 25 ( 1Ñ Hazard ( ( 2 ( I ( 400 (( ( lJLm ( ( ( 167 (± 6) Al

lJLm (( 56 lJLvs TrJLm ( ( ( 36 ( Panteleyev et al. (1995); Al, alunite; Sc, sericite

( ( ( Schloss Koprino ( d PARSON BAY FORMATION Point ( ( 50° 30' JBif  ke ( ( ( ( ( ( g lJLm ( 45 n 30 ( a ( Spencer Holberg - Winter Harbour Area ! ( L ( ( 37 ( ( 34 Island ( ( u ( ( n 66 ( ( 36 ( É U-Pb zircon date (Ma, 2 sigma error) F ( ( ( ( É i ( ( ( o ( ( B l (

lJLm ! ( e ( ( A Cove ( Medium grey to black, laminated to medium bedded impure limestone, calcareous n S ( 59 t

Port Hardy 2 ! o JBif o 38(( ! ( ( ( ( ( 42 (! 200 (± 2) 00 ( Harbour B ! uTrP 0 w

75 r 44 ( 50 ( (( !30 to non-calcareous mudstone, siltstone, and shale, locally intercalated with minor

0 ( ( ( 11 ( A ! ( B (

92L/12W, 102I/8,9 2 o 66 w ( ( (( ( !

94 ( ( (Shapland 94

42 2 ((

r ( ( ! 58 70( ( ( (( ( ( grey-green lithic wacke, feldspathic wacke, lithic, crystal and vitric tuff and reworked 010/10 ! a ( ( 24 uKBcg d MINFILE locality (102I 010/92L 10) ( (  D ( B 52 D 46 ( ( ((

! ! 50 ( ( D ( ((( ! Cove

r D ( ( 24 ( ( ( Port McNeill ( ( D 50 (( ( ( ( equivalents and volcaniclastic breccia, and rare pebbly sandstone, conglomerate and

d k ( ( 42 D77 e ( ( ( ( ( 38 Prideaux Outcrop examined

12 ( 25 ( ( ( 55 e D( (((! ( 29 47 ( !

! r ( ( debris-flow deposits; calcareous facies locally contain colonial coral horizons; organic-

JBid ((( (( ( ( 33 (( (((( ((( Point ( 70 C TrJLf TrJLm 2 !

! ( ( ! ( ( 17 ( 30

North 9-10? D( ( ( ( rich facies comprise carbonaceous to graphitic shales, mudstone and limestone; ( ( ( D Outcrop too small to show at map scale lKL ! Matthews (

( y ( ( ( ( (( 63 (  (

Harbour Ñ 42 75 er ( Nose TrJLm ( ( 23 N 45 locally abundant fossils.  Ñ Port Alice Ñ Island ( TrJVx > ! ! Ñ( ( o

93 lJL m ( ( (( Ñ r 70 ( 93

British 50 ( d  D o ( 26

! ! ( s ( tg 45 44 ( ( 9 C t 20 Roads, paved

47 40 n ( ( ( 30 57 ( ( D 9 o r D lJLs o ( Peak ( v o D Monday V Ñ ! ( e m ( Ñ ! M ( Volcaniclastic and volcanic lithologies: predominantly basaltic to andesitic epiclastic

( lJLv ( TrJLf ( Rocks a 9-10 ( 42 ((D 00 ! ! Roads, dirt

9-10 ( ( 4 26 uTrPv

Columbia ( lJLm 70 ( 52 waterlain breccias and tuffs, includes lithic lapilli tuff and tuff-breccia of phreatomagmatic n Campbell River ( ( B ! Bedwell c 45 D TrJLf 00 32

Flat Top ( 37 ! TrJLm D ( 2 ! Islands origin; minor pillow lava and hyaloclastite; locally interbedded fine-grained volcaniclastic o lJVpx ( TrJLp

(( (( and sedimentary rocks.

u 92 26 ( 92 Mountain D Grant ! ( Plumper v ( 31

e 90 52

PP Hunt Hill ! 64 62

PP 46 ! lJLv D References E

r  Bay D

aa 9 Islets 200 (± 2.1)

aa I Ñ 48 D É UPPER TRIASSIC

o 2

s 46 0

cc  n Jeletzky, J.A. (1976): Mesozoic and ?Tertiary rocks of Quatsino Sound, Vancouver Island, British Columbia; Geological

cc l D si 0 58 ! t ii a Lippy Montgomery 55 a Survey of Canada, Bulletin 242, 243 pages.

ff n A75 Qu VANCOUVER GROUP ii 91 Point 62 D 91 cc d I Point 400 cc n D Massey, N.W.D., McIntyre, D.G., Desjardins, P.J. and Cooney, R. T. (2005): Digital geology map of British Columbia: whole l McAllister

OO Vancouver e Carnian to (late) Early Norian (Holberg - Winter Harbour Area) province; BC Ministry of Energy, Mines and Petroleum Resources, Geofile 2005-1.

Port Alberni lJL t 30 Islet cc ! cc lJVx 25 QUATSINO FORMATION ee Nanaimo Cana 127° 48' 600 Muller, J.E. and Roddick, J.A. (1983): Alert Bay - Cape Scott; Geological Survey of Canada, Map 1552A, scale 1:250 000. eea da Mount d 128° 00' aa 011 Kains Medium to pale grey, thinly bedded to massive micritic limestone and locally bioclastic nn USA Kains Point uTrQ Muller, J.E., Northcote, K. E. and Carlisle, D. (1974): Geology and mineral deposits of Alert Bay-Cape Scott map area, 0 72 73 74 75 76 77 78 79 580000E 81 82 83 84 85 86 87 88 89 590000E 91 92 limestone; minor silica replacements and chert nodules; rare laminated interbeds, Vancouver Island, British Columbia; Geological Survey of Canada, Paper 74-8. Geoscience Maps 0 0 2 lJLm 0 0

5590000N 3 oolitic layers and algal mats; locally fossiliferous. 10 50 Pinnacle Panteleyev, A., Reynolds, P. H. and Koyanagi, V.M. (1995): 40Ar/39Ar ages of hydrothermal minerals in acid sulphate-altered

Victoria Island Carnian Bonanza volcanics, northern Vancouver Island (NTS 92L/12); in Geological Fieldwork 1994, BC Ministry of Energy, Mines and

2006-3 ! Base Map Information Data Compilation Petroleum Resources, Paper 1995-1, pages 61-65. N  2006-2 89 10Ñ 89 KARMUTSEN FORMATION Base map has been produced from digital TRIM (Terrain Resource Inventory

35 N G.T. Nixon, K.A. Johnston and M.C. Kelman

Kains Approximate mean magnetic M Management) 1:20 000 topographic database provided by the British Columbia Aphanitic to plagioclase-phyric and locally plagioclase-megacrystic basaltic lava flows, 35  ! Island declination 2005 for centre Ministry of Environment, Lands and Parks. uTrK commonly amygdaloidal; predominantly subaerial flows in the upper part of the Olympic Cape ! 30 of map area: 19 degrees succession; may include minor pillow lava, breccia and hyaloclastite. 2006-4 2006-1 88 Parkins ! 88 40 minutes east decreasing North American Datum (NAD) 1983. Universal Transverse Mercator Projection Recommended Citation Magnetic Peninsula lJLm annually 13 minutes per year (Zone 9). Elevation in metres above mean sea level. Contour interval 100m. uTrKls Trend/locality of thin grey limestone beds and lenses intercalated with basalt Nixon, G.T., Hammack, J.L., Koyanagi, V.M., Payie, G.J., Snyder, L.D., Panteleyev, A., Massey, N.W.D., Declination Digital Cartography: K.A. Johnston near the top of the succession. f Archibald, D.A., Haggart, J.W., Orchard, M.J., Friedman, R.M., Tozer, T., Tipper, H.W., Poulton, T.P., Palfy, J., Cordey, F. and Barron, D.J. (2006): Geology of the Holberg - Winter Harbour area, northern Vancouver Island; BC Ministry of Energy, 58 59 560000E 61 62 63 64 65 66 67 68 69 570000E 71 Mines and Petroleum Resources, Geoscience Map 2006-3.