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The anticline crossing Sikanni Chief River below the mouth of Chicken
Creek is a northward continuation of the Pink Mountain structure, and
trends about north 20 degrees west. On the axis of this anticline, at and
near river level, the Pardonet beds and ‘Grey beds’ outcrop and are sur-
rounded by outcrops of the Fernie and Bullhead groups. A southwest-
dipping fault on the northeast limb of this anticline thrusts lower beds of
the Bullhead group over upper beds of the same group, with a displacement
of 1,000 feet (Hage, 1944). The southwest limb of the Chicken Creek
anticline is modified by a low roll and a southwest-dipping thrust fault,
interpreted by Hage (See Figure 3) to be a branch of the fault on the north-
east limb of this anticline. The two faults are thought by Hage to join
at depth. Farther west is a deep syncline with southwest-dipping axis and
faulted on the southwest limb. ‘This structure lies near the crossing of
the lower trail, that is, the trail from Quarter Creek. West of this structure
to the Rocky Mountain front, Triassic rocks are folded into numerous,
open folds. In the western part of his section, only one fault is recorded
by Hage, a thrust fault near the axis of a deep, narrow syncline (See
Figure 3).

East of the Chicken Creek anticline, Hage has mapped four anticlines
in a distance of 4 miles, all of which show closure. He has mapped one
fault in this part of the area, the plane of which he considers to have an
easterly dip. Beds of the Bullhead group and Buckinghorse formation are
involved in these structures.

Buckinghorse River Valley Structures
(See Figure 3)

On both branches of Buckinghorse River, Hage (1944) has recorded
three anticlines in the Buckinghorse formation, with dips of from 5 to 55
degrees. Farther west he has mapped two anticlines in Triassic, Jurassic,
and Lower Cretaceous formations, with dips of trom 15 to 70 degrees.

Pocketknife Anticline

The Pocketknife anticline occurs on about the eastern border of the
Foothills, between Klingzut Mountain and Minaker River. It trends north
25 degrees west, is long and narrow, and has dips as high as 50 degrees on
the flanks. Triassic beds outcrop along the axis, and the Jurassic Fernie
group, Jurassic? and Lower Cretaceous Bullhead group, and Lower Cre-
taceous Buckinghorse formation on the flanks of the structure. Apparently
the anticline shows both northwest and southeast as well as northeast and
southwest closure (Hage, 1944). It is not known whether the northeast
limb is modified by a thrust fault.

TETSA RIVER FOOTHILLS
Eastern Triassic Belt
(See Figure 7)

Williams (1944) has mapped two Triassic belts, separated by a fault
plock of Palsozoic rocks, in the Foothills along the Alaska Highway in
Tetsa River Valley. In the eastern belt of Triassic rocks, McLearn (1946)
has described three anticlines west of mile 375 on the Highway, and other
anticlines, possibly two, occur east of mile 375.

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