306 CHARLES S. PROSSER 
4. Bluish-gray sandstone weathering to a rusty color, from 6 to 8 
inches in thickness - - - - - - - - - Y+ 11% 
3. Grayish to bluish-gray shales, argillaceous and slightly gritty 
containing some specimens of Chonetes and Lingula - - 4px 102 
2. Bluish-gray sandstone which weathers to a rusty color, 5 inches 
thick - - - - - - - - - - - ifs 6 35 
I. Rather bluish argillaceous shales, which, near creek level, are 
more arenaceous and bituminous, containing numerous speci- 
mens of Lizgzla melie Hall and L. cuyahoga Hall - - =O 6 
All of the above shales weather to a rusty color on exposure, 
contain fossils, are blacker than those of the lower Cuyahoga 
shale in the Cleveland region, and in addition contain a much 
larser: number ot specimens sof, Lineaie itis) they writers 
opinion that the above shales are in the lower part of the 
Cuyahoga formation and above the Sunbury or Berea black 
shale. 
These rocks were named the Orangeville shales by Dr. I. C. 
White, who stated that the name was used ‘“ merely for the con- 
venience of avoiding in this report a premature discussion of 
the question of its identification with the Waverly black shales 
of Andrews, or lower member of the Cuyahoga shale of New- 
berry.” * He described it as: ‘‘ A group of shales, prevailingly 
blue, but often rusty or reddish-brown on exposed surfaces, 
always more or less argillaceous, seldom exhibiting sandy layers 
more than 6 inches thick; and containing considerable quanti- 
ties of scattered iron ore balls,” with a thickness of about 75 
feet at Orangeville.* While under the description of Pymatun- 
ing township, in which the eastern part of Orangeville is located, 
is the following account of the cliff below the Orangeville street 
bridge: ‘The horizon is 300 feet below that of the Sharon coal, 
and therefore under the Cuyahoga shale. The upper portion of 
this exposure consists of reddish-gray shales, interstratified with 
thin flaggy layers; but down near the creek level the shales 
begin to grow much finer and darker; and just below the mill- 
dam fragments of a dark-bluish fine-grained shale in the water- 
bed are perfectly filled with Discina pleurites and Lingula mele, 
This can hardly be the Cleveland shale of Dr. Newberry.”3 In 
* Second Geol. Surv. Pa., Q?, 1880, p. 63. 2 Thed., p. 63. 3 Jbzd., p. 160. 
