PROSSER. | The Upper Permian. 71 
About one and one fourth miles southwest of the above locality 
ix another fairly good exposure on the banks of a small pond, in 
the scuthern part of section 4 Washington township. This shows 
some 15 feet of argillaceous, unfossiliferous shales, the lower and 
greater portion of which are thin, vellowish and bluish, and above 
these are some harder and thicker layers capped by 2 feet of red 
shaies. 
Near the summit of the ridge three miles south and one half 
mile west of Bavaria, in the southwest corner of section 10, Wash- 
ington township, Mentor fossils were found in the brown iron col- 
ored rock on top of the yellowish Wellington shales. The base of 
the Mentor at this locality is from 160 to 170 feet above the Smoky 
Hill river level, nine and one half miles directly east. One mile 
south of the locality Just described, four miles west of Smolan and 
eleven and three fourths miles west of the Berwick school house 
Mentor beds, on the roadside at the northwest corner of section 22 
Washington township, is an excellent exposure of the brownish-red 
very fossiliferous Mentor beds. A little below are yellowish, ar- 
gillaceous shales, which according to Mr. Beede are shown for 
some 50 feet in the well in the draw just south. This exposure is 
fully 150 feet above the Smoky Hill river, 10 miles directly east. 
Professor Udden concluded that the Dakota in Saline county dipped 
S fet per mile to the east. A dip at this rate to the east would 
carry the outcrop of the Mentor beds four miles west of Smolan, 
down to only 66 feet above the river level on the hill east of Ber- 
wick schooihouse. It will be remembered that in the section of 
that hill the approximate base of the Mentor beds is given as 60 feet. 
Six miles south of the above locality, at Falun, are two buttes 
capped by brownish-red sandstone containing fragments. of parallel 
and netted veined leaves, apparently Dakota species. Below, from 
wells and exposures by the roadside are bluish and yellowish shales, 
some of which are rather coarse and contain gypsum of the Wel- 
lington. The base of the Cretaceous on these buttes is about 1370 
feet A. T., or approximately the same as at the Mentor locality six 
miles north. The Wellington shales are quite well shown around the 
1 American Geologist, Vol. VII, June 1891, p. 344. 
