In general, the amount of shale decreases upsection. The lower part of the Kope Formation contains about 80 percent shale. Shale content diminishes to about 70 percent in the upper 12m of the Kope Formation, and the Fairview Formation and overlying undifferentiated bedrock contain less than 50 percent shale (Osborne, 1974; Ford, 1974; Luft, 1971,1972; and Gibbons, 1972). The changing shale content commonly is expressed as a slight break in slope at the contact between the Kope and overlying formations; slopes formed on the Kope Formation are a few degrees flatter than
slopes on overlying bedrock.