118 GEOLOGY OF OHIO. 
and No. 8 frequently carries pyrites. At Mr. Nelson’s bank, which is not: 
more than one hundred and fifty yards from the last, the bed shows— 
FT. IN. 
1.) Roof Coal cere ee ees Sa rank ate Sn en en nen 6 
Be, Clay: cosets Sho cay pects Se See ees CPR eh ee ee St oe 0 to 1 6 
9s) (Coal cc Sue See ook se Des Soe ee ue ep ee con ae 5 
This presents little difference from the other. Pyrites, as well as car- 
bonate of lime, sometimes occurs in films upon the faces in the lower 
coal. These two openings are typical in character of those in this vicin- 
ity. The coal is a good gas coal and an excellent fuel, but for all purposes 
is regarded as inferior to that obtained from Coal No. 6, in the Steuben- 
ville shaft. The slack makes good coke in ovens, but burns too freely to 
coke in heaps. In several instances slack-heaps caught fire, and instead 
of coking were reduced to ashes. As there is too much sulphur in the 
coke to admit of its use in the manufacture of iron, the slack is not util- 
ized. The coal is quite soft, and is mined by wedging. One man can 
take down and put out sixty-five bushels per day. At Mingo this bed 
is but four feet thick. 
The limestone, twenty-five feet below the coal, is quite fossiliferous, 
containing many imperfect lamellibranchiates along with almost innum- — 
erable gasteropods. It is extensively used in the manufacture of lime. 
Attempts have been made to employ the Crinoidal Limestone for this 
purpose, but they have always been unsuccessful. The rock is very com- 
pact, and contains the characteristic grouping of species. 
About twenty-five feet below the Crinoidal Limestone is a small coal, 
varying from twelve to fifteen inches in thickness. It is fully exposed 
on the road leading from Mr. Nelson’s bank. Many years ago it was 
opened by Mr. Nelson’s father, who found the coal very pure. It was 
much prized by blacksmiths in the vicinity, not only because it gave a 
quick, hot fire, but also because it was so remarkably clean. It is seen 
in several of the adjacent ravines, and shows little variation in thick- 
ness. It occupies the relative position belonging to Coal No. 7b, which is 
found in Harrison and Carroll counties, but was not seen elsewhere in 
Jefferson county. 
The sandstone at the base of our section is quarried near Steubenville, 
and proves to be a very pretty, though rather soft, building stone. 
