130 ALASKAN MINERAL RESOURCES IN 1904. [bull. 259. 
After the irregularities due to the above-mentioned causes have 
been eliminated the following structural features distinctly appear. 
The region consists of an undetermined number of parallel, closely 
folded anticlines and synclines, with pitching axes that extend in ar 
average direction N. 35° E. The prevailing strike is northeast and 
southwest, and the prevailing dip is from 35° to 60°. The most 
plainly developed of these folds are the Katalla Valley anticline, the 
Strawberry Point syncline, and the Chilkat Creek anticline. 
The Katalla Valley anticline extends through the Katalla Valley in 
an average direction of N. 38° E. Exposures on the western flank 
showed strikes of N. 55° E. and N. 85° E. with northwestern dips, 
varying from 18° to 65° on the west shore of Bering Lake, and a 
strike of about N. 40° E. with a northwest dip of 70° near the mouth 
of Deep Creek. The strata are almost continuously exposed along 
the eastern flank in the high ridge that forms the eastern side of the 
valley. The strike varies from north to N. 40° E. and the dip is 
southeast at an angle varying from 32° to 60°. The outcrop in the 
high southern peak of this ridge is an unexplained irregularity, for the 
strike is here N. 60° W. and the dip is southward at an angle of 35°. 
Apparently the strata have been abruptly flexed or faulted at this 
point, striking almost at right angles to the rest of the ridge. 
The Strawberry Point syncline adjoins the last-mentioned fold on 
the southeast. The rocks are best exposed in the crescent-shaped 
ridge that forms the northern shore of Strawberry Harbor and pre- 
sents its concave face toward the sea. The dip is everywhere toward 
this concavity, changing from southwest at Point Hey to southeast a 
Cave Point, showing the presence of a pitching syncline of which onli 
the nose is on land. This fold becomes less evident as one crosses inw 
the steep slopes in the valley of Mary Creek, but can be traced in j 
general direction of about N. 32° E. almost to Bering Lake. Th i 
outcrops in the valley of Burls Creek are on the eastern flank and nea 
the northern end of this fold. These outcrops show great local varia 
tion, many of them doubtless being large blocks which have becom \ 
involved in landslides of great magnitude. 
The fold next east of this whose presence is definitely established : 
the Chilkat Creek anticline. This is a sharp fold whose axis extenc 
N. 35° E. through the valley of Chilkat Creek. The center of tt j 
anticline is very steep and is locally crumpled. The dip on the flanl 
averages about 45°. 
The ridge east of this valley between it and Bering River is appa 
ently synclinal, with a strike ranging from N. 35° to 40° E. Th 
fold is very sharp along the axis, for the rocks at the mouth of Berii •: 
River stand vertical, though farther up the river the dip is north we 
at an angle of 40°. 
The same northeast strike and northwest dip may be seen on Kayi 
