PROSSER. | The Upper Permian. 69 
the shales, but apparently unconformably. Base 
of the Cretaceous, probably Dakota. 
3. Yellowish to brownish and buff soft argillaceous 29—55 
shales. 
2. Bluish to drab shales that weather to a buff color 15—26 
—thin and somewhat laminated. 
1. Covered. <A little farther up the river the blue 11—11 
shales show to the water level. 
Level of the Smoky Hill river.t 
No fossils were found in the rocks composing the above section, 
although careful search was made for them. Nos. 1, 2 and 3 have 
been referred provisionally to the Wellington, simply on account 
of the absence of fossils and their lithologic characters. Two miles 
farther up the river is the Bacott quarry with the Marion fossils, 
and on the hill two and one half miles southeast of the river bluff 
section, in section 21 Greeley township, buff limestones with 
Bakevellias were found at an elevation near that of the shales in 
No. 3 of the section. It seems probable that the small anticlinal 
fold noted in the Bacott quarry has brought up the top of the 
Marion at that locality, so that lower rocks are exposed than in 
the section at the mill. 
Six miles south of Salina and the Upper Mill section on the 
Smoky Hill river is the small village of Mentor in Walnut town- 
ship. A section east of Mentor was measured from the river level 
past the Berwick school house to the top of the ridge two and a 
quarter miles east of the river. This is the typical locality of the 
“Mentor beds” of Professor Cragin which will be discussed later. 
The Mentor Section. 
No. Feet. 
3. Mostly covered; but apparently a brownish sandstone 10—140 
similar to that below. 
2. Iron brown sandstone exposed at intervals along the 70—130 
roadside and in the field. Three quarters of a mile 
east of Berwick school house. Partly covered. In 
layers are abundant fossils. Apparently the base of 
the Mentor. 
1 Prof. Robt. Hay called this hill Dakota with Permo-Carboniferous shales at 
the base (Transactions Kansas Academy Science, Vol. IX, 1885, p. 112). 
