32

on the south side of Toad River; at mile 418, beneath the Liard River
bridge; and on the west side of McDonnell Creek. It comprises the fol-
lowing: Thickness
Feet
Limestone, thin-bedded, grey, silty, with thin shale partings; on
weathered surface has appearance of dark green to black chert 100
Limestone, grey, silty; interbedded with shale, dark green to
black, mottled, sandy.................... site: ae 70
Limestone, hard, irregularly bedded, grey to light tan, sandy,
with calcite veins; fossiliferous...............seeeeeeeeeee
Unconformity :
Limestone, massive, grey, silty; shale, soft, thin-bedded, silty,
greyauo) blacks fossiliferousivaas serie cic omieeie cieteie etme reine 165
The upper 100 feet of this section is described by Williams as a thick
zone of chert, and is regarded by him as Pennsylvanian or Permian (See
below). The massive limestone in the lower (165 feet) part is said to
increase in proportion to the shale from the base, upward. ‘The contact
between these basal beds and the intermediate 70 feet of the section is
recorded as somewhat irregular, abrupt lithologically, and marked by local,
thin, conglomerate beds at the bottom. Like Williams, Laudon and
Chronic collected a fauna in the lower 165 feet of the section, and their list
includes species of Productella, Dictyostylus, Leiorhynchus, Spirifer, other
brachiopods, and Deltopecten. They note that some of these species occur
in the Calico Bluff formation, of early Meramec age, near Eagle on Yukon
River, Alaska, and also in the Moorefield formation of the Ozark area,
which is of post-Osage age. A fauna, similar to that collected in the lower
beds, was found in the intermediate beds, below the upper (100 feet) beds.
The combined section of the lower (165 feet) and middle (70 feet) beds was
thought to have a stratigraphic position between the Kinderhook (Banff)
and Rundle formations of the Banff and Jasper areas. The authors
assume, of course, that the Banff-Rundle contact is disconformable, and
they describe the cyclic sedimentation in the ‘Kindle’ formation as they
have in other formations of the Alaska Highway section.

PENNSYLVANIAN
Pine River Valley

Williams and Bocock (1932) describe strata of Pennsylvanian age on
Pine River between Callazon and Mountain Creeks. The sequence,
because of the disturbance of the rocks, is difficult to determine. Williams
and Bocock consider the section to be somewhat as follows, only parts of
the section being measured:

Top of Section Thickness
Limestone, a thick bed Feet
Limestone, very fossiliferous
Limestone, siliceous; with bands of quartzite up to 2 feet thick
Limestone, hard, very pure, well crystallized, fossiliferous....... 20+
Limestone, hard, flinty, with inclusions containing crinoid stems
Limestone, black, with Productus
Concealed

Quartzite, massive, hard, flinty.............................. 30+

_ calcite (several hundred feet)
Limestone, platy, thin-bedded, dark grey