49

East and West Glacier Spurs (not on map), on the south side of Peace
River, are on the line of strike of the strata of the east and west spurs of
Brown Hill, respectively (See Figure 8). The Hast Glacier Spur, like the
east Brown Spur, is underlain by massive, calcareous sandstone and lime-
stone with the Nathorstites fauna. All strata are concealed between East
and West Glacier Spurs. On the eastern slope of the west spur, however,
are good exposures of the uppermost part of the ‘Grey beds’, including grey,
massive limestone and grey, fine, calcareous sandstone.

The upper part of the ‘Grey beds’, including the Lima? poyana zone,
is well exposed at the east end of Pardonet Hill (See Plate V B) in an area
drained by Laurence Creek (See Figure 9). The section has been measured
by McLearn (1947) and, in descending order, is as follows:

Thickness

Feet
(Approximate)
Sandstone, thick-bedded, massive, fine and very fine, grey, cal-
careous; limestone, shelly or finely crystalline, partly cri-
noidal, grey; siltstone, grey, calcareous; with the Lima? poyana

Chin Meta aneEb Sn Sat aaa OhAabe HOErEend Hea SeeOE mouOrad 520
Sandstone, massive, caleareous; mostly barren, but with rare
fossils, including Myophoria and ‘Orbiculoidea’.............. 280

Aylard Summit and Hackney Hills

H. H. Beach (field notes) has collected specimens of the Nathorstites
fauna on Aylard Summit!, about 10 miles north of the mouth of Aylard Creek.
There the lower part of the ‘Grey beds’ is evidently present. Beach has
also found the lower part of the ‘Grey beds’ on the east side of the Hackney
Hills, 14 miles north of Graham River, where he has collected specimens
of the Nathorstites fauna.

Halfway River Valley

The ‘Grey beds’ are known to occur at several localities in Halfway
River Valley, but very little information concerning them is available.

Calcareous sandstones and grey limestones are exposed north of the
pack-trail on the north side of Halfway River, 7 or 8 miles west of Quarter
Creek. They contain a few pelecypods, and appear to belong to the lower
part of the ‘Grey beds’.

The ‘Grey beds’ are well exposed on Mount Wright on the north side
of Halfway River (See Plate III B). They overlie the ‘Dark siltstones’ in
the upper part of the Fourth Gully where they consist of grey, massive,
fine, calcareous sandstone and grey limestone. They also overlie the ‘Dark
siltstones’ between Second and Third Gullies, where they are exposed at
intervals in protruding ledges, dipping steeply to the west, and consist of
massive, thick-bedded, grey, fine, calcareous sandstones and grey lime-
stones with rare fossils. Higher beds at Second Gully include thick-bedded,
grey, calcareous, fine sandstone, siltstone, and some limestone. Higher
beds of this unit are concealed on the lower slopes of Mount Wright between
First and Second Gullies (McLearn, 1946A).

1 Aylard Summit has not been located on any map. It lies, however, about 10 miles north of
Gold Bar or north of mouth of Aylard Creek.