226 CHARLES S. PROSSER 
little east of stop 8 on the Lake Shore Electric Ry. The section on 
the northern bank of the cut is as follows: 
SECTION OF SLATE CUT THICKNESS Tees 
No. Ft. Tete Tn. 
4. Huron shale: Black, bituminous, hard, slaty 
shale. At one part of the cut is a bluish-gray 
lens from 23 in. to 3 in. thick and in the blackish 
shale just above are Lingulas. Toward the 
eastern end and some 5 ft. above the base is a 
spherical concretion. On this bank 8 ft. 3 in.+ 
are shown and on the southern g ft. 6 in. of 
shale which does not reach the subjacent 
[MmeStOMe:: hfs, sre Mon a eee ote ee ae Ee 8 3 -O 6— 
3. Prout limestones The upper 17 in. contains a 
large percentage of marcasite, and the entire 
layer as weathered is greatly ironstained....... 3 2 2 
2. Rather shaly layer containing crinoid segments 
andssomerother tossilSy sete eee ae ues i Ti+ 
1. Massive layer of rather dark gray, dense, and 
very hard limestone. Contains cup corals, 
crinoid segments, and some other fossils. The 
calcareous material of the corals has been 
largely replaced by silica. Dip of top of this 
layer between 13° and 2°, 20°S. of E. Bottom 
OLLCUE SS LUE FD Nts Ae Senn ec ane a eae I 103 I 103 
This section is shown in Fig. 2 and it has been briefly described 
by Dr. Stauffer who stated that “the Prout member of the 
Olentangy is nicely exposed with the overlying Huron shale.’”? 
Shore of Lake Erie.—On the shore of Lake Erie about north of 
the house of Dr. J. P. Esch and stop 15 of the Lake Shore Electric 
t This name was proposed for the limestone between the superjacent black Huron 
shale and the subjacent gray Olentangy shale by the writer in October, 1903, and the 
name published in December of that year (Ohio Naturalist, IV, 47). The typical 
locality is Deep Cut on the Baltimore & Ohio R.R., 6 miles south of Sandusky and 
about one mile north of Prout, in which 5 ft. of limestone are now shown (see Geological 
Survey of Ohio, 4th ser., Bulletin 10, pp. 119, 120), although in Dr. Newberry’s section, 
which was probably made when the cut was new, it is given as ro ft. (see ibid., II 
(1874), 190, No. 2 of section). This limestone is known only in the northern part of 
the state and it is probably well to consider it as a lentil or member of the Olentangy 
formation as has been done by Dr. Stauffer (zbid., Bulletin 10, pp. 117, 119, 120 and 
Tle IDS) 
2\Tbid- p. 122. 
