47

Creeks, on the north side of Peace River (See Figure 8). It overlies the
Dark siltstones’ exposed at the east end of the Beattie ledge. A section
has been measured by McLearn (1940A) and, in descending order, is as
follows:
Thickness
Feet
(Approximate)
Sandstone, very fine, calcareous; siltstone; and impure, shelly
limestone; dark grey, light grey weathering, massive and

mostly thick-bedded; carries Lingula............20000ece 800
Similar beds with Lingula, and brachiopods and pelecypods of the
‘Nathonsitiesitaun anos sce nt circ eae is: ieee tie 200

Similar beds with Nathorstites; other ammonoids and brachiopods
and pelecypods of the Nathorstites fauna..................

Upward, the brachiopods and pelecypods of the Nathorstites fauna extend
higher than the Nathorstites and other ammonoids; Lingula appears with
the brachiopods and pelecypods and finally only Lingula is recorded. The
‘Grey beds’, with a lithology similar to that of the beds on Beattie Hill and
with the Nathorstites fauna, are exposed on the high hill on the north side
of Peace River Valley, east of Aylard Creek and north of the Beattie ranch.

A section of part of the ‘Grey beds’ is exposed between Red Rock
Spur and McLay Spur on the north side of Peace River Valley about 5 miles
west of Beattie Hill (See Figure 8). This section does not include the lowest
part of the ‘Grey beds’, that with the Nathorstites fauna, for being below
river level the Nathorstites zone does not outcrop. The higher part of the
‘Grey beds’, however, from the Red RockSpur faunal zone to the contact
with the overlying Pardonet beds can be studied, and is roughly 1,300 feet
thick. The following is the general sequence, but detailed measurements
are not available:

Pardonet beds

Limestone, grey, partly dark grey, crystalline, shelly, and crinoidal;
sandstone, grey, fine, calcareous; siltstone, calcareous; all inter-
bedded in many layers and with rare fossils.

Sandstone, massive, grey, fine, calcareous; limestone, grey, partly
crinoidal; limestone, impure, silty; siltstone, caleareous; limestone,
the ‘coquina’; all interbedded in thick Jayers and with species of
Lima ? poyana fauna.

Sandstone, fine, calcareous, with Lingula.

Sandstone, grey, massive, calcareous; limestone, grey; siltstone; all in
thick layers and mostly barren.

Sandstone, grey, fine, calcareous; limestone, grey, impure; siltstone,
grey, calcareous; all in thick layers, weathermg grey, yellowish,
and reddish, with the Red Rock Spur fauna of pelecypods.

West of McLay Spur, the west dip carries the ‘Grey beds’ below river level.
The ‘coquina’ limestone is a prominent and readily identified bed and con-
sists of 5 fect of limestone composed mainly of comminuted shells and a few
entire shells (McLearn, 1941B).

The higher part of the ‘Grey beds’, with the poyana zone, reappears
west of the Jewitt fault, and is exposed on the lower slopes at the southern
ends of Jewitt Spur and Schooler Hill and on the Dry Canyon shoulder
(See Figure 8). ‘The ‘coquina’ limestone can be traced along these slopes,
where it is very useful in determining structure. It outcrops in the long