woe

| Sikanni Chief River | Sikanni Chief River
Ee ieseballss Shi north of : in vicinity of

_ Mountain Pink Mountain = Mount Withrow

i

Upper part (Upper Triassic)

Monotis subcircularis | x
Monotis aJaskana |X x
Hero se. amet |X X | No
Halobia pacilis | Xe | collection
Myophoria 1X X made
Gryphaea chakii i X | X | below
Oxy toma x | Monotis
Spiriferina We subcircularis
TClionites' nesp. X zone
Goniomya n.Spe ? | { x |
Pleuromya ? nidovana | | x |
Haima votites columbianus | me |

|

H i nn ne NN NEN

Middle and Lower part (Middle Triassic) —

Spiriferina
Coenothyris
Daonella
Wathorstites
Protrachyceras i
Ptychites
Trigonodus ? sp.
Danubites ?

Para popanoceras ?

Pecconmnure ann | Xx

SE SE AMG TCO enka ones Ve RONG CNET i
i :

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pea Se Seti Rae

4

A fossil horizon approximately 200 feet from the top
of the formation on Pink Mountain ‘contains a large number of vertebrae
and other bones. C.M. Sternberg of the Geological Survey identified
those collected and photographed as ichthyosaur ribs and vertebrae

Pte S to the genus Shastasaurus.

On Pink Mountain the highest faunal zone contains

Monotis alaskana, whereas farther west, along Sikanni Chief River,

it is overlain ay & zone containing Monotis subcircularis, the
highest faunal zone in the Triassic along Peacé River. The faunal
zones are quite similar to those described by McLearn from the
Schooler Creek of Péace River. It is uncertain, however, if the
lower member of black shale is present on Peace River where the
basal part of the formation is concealed.

An unconformity is thought to mark the top of the for-
mation, especially as it is kmown that higher faunal zones are
present in the mountains along Sikanni Chief River than on Pink
Mountain. The upper, Monotis and Halobia zones were not observed
on Pocketknife anticline west of Minaker River.