Geological Survey Bulletin 581—B Oil and Gas in the Western Part of the Olympic Peninsula, Washington

ROCKS EXPOSED ALONG CALAWA RIVER.

The rocks on Calawa River were examined only at location A, on the south side of the river, in the southern part of sec. 35, T. 29 N., R. 13 W., about 3 miles northeast of Forks. At this place 300 to 400 feet of gray and brown sandstone, much broken by faults, is exposed. The rocks are principally massive, and on account of faulting the joints and bedding planes are so nearly alike that it was difficult to distinguish one from the other and to measure the true dip and strike. The prevailing dip seems to be 62° NE. and the strike N. 45° W. These rocks probably belong to the same formation as do those in the vicinity of Bogachiel to the south, namely, the Clallam formation, of Oligocene and Miocene age.

The Washington Oil Co. is drilling a well on the Anderson farm in the SW. 1/4 SE. 1/4 sec. 9, T. 28 N., R. 13 W., about a mile south of Forks. In the latter part of March 1, 1914, the drill had penetrated to a depth of more than 1,600 feet. A general section is given below:

Driller's record of the Washington Oil Co.'s well on the Anderson farm near Forks.