C. D. Walcott— Permian and other 
PLANE OF BY EROSION. 
5 Upper 
2 ppe Gypsiferous and arenaceous shales and marls, with 
19 Permian. ; 3 
ws impure shaly limestones at the base. 
710 feet. 
4 
rs PLANE OF BY EROSION. 
a LP Same as upper division with more massive limestone 
Pu - 145 ft) ot the base. 
PLANE OF UNCONFORMITY BY EROSION. 
Upper ; ; 
Massive cherty limestone with arenaceous gypsifer- 
Aubry. 
‘ous bed passing down into calciferous sandrock. 
835 feet. 
3 
oa] 
> 
= : 
oo Lower Friable reddish sandstones gassing into more com- 
a Aubry. pact and massive beds below. A few filets of im- 
EA 1455 feet. | pure limestone are intercalated. 
fy 
& 
= 
<4 
=) 
Red Wall Arenaceous and cherty limestone 235 feet, with 
Limestone. massive limestone beneath. Cherty layers, coincident 
970 feet. with the bedding, in the lower portion. 
PLANE OF BY EROSION. 
Devonian. : : 
100 feet. Sandstones and impure limestones. 
PLANE OF UNCONFORMITY BY EROSION. 
3 = Massive mottled limestone with 50 feet of sandstone 
= 235 feet. at the base. 
2 F 
% Tonto Thin-bedded mottled limestone in massive layers. 
E Primordial. Green arenaceous and micaceous shales 100 feet, at 
bes 550 feet. the base. 
Entire thickness of Paleozoic, 5000 feet. 
