166 GEOLOGY OF OHIO. 
The limestone (No. 5) is‘exposed in the roads along the hilisides. It is 
rudely conglomerate, bluish, and yields a good lime even when roughly 
burned. A limestone occupying this position is seen in the bank of Lit- 
tle Short Creek, not far from the Belmont county line. There it is im- 
beded in a mass of clay shale, not laminated, and occurs in three layers, 
fourteen, five, and four inches thick respectively, and separated by one 
to three feet of the shale. Below these about six feet is a thin, irregular 
layer of nodular ferruginous limestone, extending less than one hundred | 
yards, and describing many odd curves. 
The shale immediately overlying the Crinoidal limestone are black, and 
‘from seventy to eighty teet thick. Near the base they contain many im- 
pressions of Neuropteris and Calametes. At one locality a sandstone ten 
feet thick is seen twelve feet above the limestone, gray to reddish brown 
in coler, of concretionary structure, and containing vast numbers of im- 
perfect vegetable impressions. The Crinoidai limestone is occasionally 
seen in the hillsides along Short Creek, and many fragments are seen in 
the stream; but the bed does not reach the creek level until near the 
western side of the township. On Little Short Creek it is a prominent 
feature in the hills for a mile or more above the junction of the two 
streams, and finally passes under the creek near some ruined mills, be- 
tween three and four miles from Portland. It is in three layers. The 
lowest, two feet thick, 1s quite compact, and crowded with plates, stems, 
and spines ef crinoids, most of which beleng to Zeacrinus mucrospinus, or 
to a closely allied species, together with many specimens of Spirifer cam- 
eratus, Productus semireticulatus, P Nebrascensis, P. longispinus, and Chonetes 
Smithit. This portion of the bed is very hard, and the fossils can not be 
separated. The upper layers are coarsely granular, and yield readily to 
the weather. They are blue, while the other is gray. On top, Relza 
punctulfera and Hemipronetes occur in fragments. The rock is too silicious 
to yield a good lime. 
Mt. Pleasant Township.—Except in the immediate oii of Short 
Creek, the surface of this township is so elevated that Coal No. 8 is barely 
available. Upon the tributaries of that stream, however, it is readily 
accessible. The coal area, which the greater portion of the town- 
ship, will be quite valuable in case an outlet for the coal should 
be afforded, for back from the creek to the scuthern line of the county 
there is hardly a ravine of sufficient depth to reach No. 8. Large plots, 
therefore, can be obtained almost entirely free from unsound Soe and 
with excellent opportunity for easy working. 
In the south-eastern corner of the township, the old Wheeling plank 
road crosses Little Short Creek not far above where Coal No. 8 disappears 
