1916] Martin: Pliocene of Middle and Northern California 237 



section fossils are extremely abundant, often occurring in solid 

 beds a foot or more in thickness. Beyond the Scotia Bluffs the 

 beds enter a rugged and heavily timbered region where they could 

 not be traced with accuracy. They undoubtedly extend northward 

 to the Van Duzen River, where the uppermost part of the series 

 should be found. 



Shively Section. — Along the railroad track, one and one-half 

 miles southeast of Shively, a very excellent section of strata was 

 encountered. The base of the section, which is near the base of 

 the series, consists of reddish-brown shale and light-brown shaly 

 sandstone. The brown shale is overlaid by a blue-gray shale which 

 grades into a coarse-grained gray sandstone. The latter is very 

 fossiliferous and forms a prominent bluff on the north side of Eel 

 River just below Bryan's Rest. The strike of the strata at this 

 locality is N 75° AV. The dip is toward the northeast at an angle of 

 fifty degrees. One mile north of Shively the same horizon occurs 

 as a prominent bluff on the east side of the river opposite the small 

 town of Pepperwood. Here the strike is N 40° W, with a small 

 east dip. 



All of the sections here described have a close similarity with 

 respect to the larger lithological divisions. We find in each case 

 a similar sequence of beds. The lower portion in each section 

 consists of rusty-yellow shales with light-brown and gray shaly 

 sandstones. Overlying this is a series of gray and blue-gray sand- 

 stones with some clay shales. Toward the top the sandstone becomes 

 coarse-grained and often conglomeratic. It is evident, therefore, 

 from these sections that the Wildcat Series can be divided into two 

 divisions on a lithologic basis — a lower member consisting of brown 

 and rusty-yellow shales, followed by brownish-gray sandstone, and an 

 upper member consisting of gray and blue-gray sandstone, with some 

 clay shales and well cemented layers of sandstone, followed by coarse 

 sandstone and conglomerate in some sections. In the Scotia section 

 the division between the two members occurs about three-quarters of 

 a mile north of the railroad station at Scotia. In the Alton section 

 the division occurs on the south bank of the Eel River south of 

 Metropolitan. 



FAUNA OF THE WILDCAT SERIES 



Taken as a whole, the Wildcat Series is one of the most fossil- 

 iferous Tertiary formations known along the coast of California. 



