104. GEOLOGY OF OHIO. 
Ft. 
ORD EHOXGY Hea OURS) LOUTAEYTKOYMG).4.99000000000000000000000000006000000000000000000000005 2 
Tnntervall oiiccscc ccccshectetn secs cectieas 0 uss ces cues iscscccsoreecnce nessa reeomtene 46 
Timestone and fiint—Upper Mereer, bearing OFe................seceseeeee 2 
Tn te rvealieeh beng sees eee c aos fossa te neadh S seutedatiiensienecenc eaten eae sees 30 
Limestone—Lower Mercer, bearing Ore ..........ccececesceccscceeceseeees on 2 
Coal—Lower Mercer, thin. 
Intervals scinscsisoeesseeces sscssee noes \ RcateLinccastises aivctememe seinen mene camettest 14 
Oiro—AVinnayenvorn (Ontiyy7 lol Koxel CFR) 44000600800060000000000000.1900050000 60000.000005000 1 
The McCuneville coal is traced by continuous workings into the 
Great Vein of Shawnee and Straitsville, and this in turn is strictly con- 
tinuous with the Nelsonville and Monday Creek coal, and thus our 
section is carried at once to the west side of the Hocking Valley. 
There is not only no question but there is really no room for 
question as to the fact that the upper coal at McCuneville becomes the 
main coal of the Hocking Valley in its several subdivisions. In other 
words, the Nelsonville or Straitsville seam is the Middle Kittanning 
coal. This wide-spread seam here scores its highest mark both as to 
volume and quality, and forms the central element in the most important 
coal field of the State. 
The Lower Kittanning coal still attends it as a constant companion, 
but though often of a thickness that would be counted mineable else- 
where, it is so overshadowed by the greater seam above it, that little 
account is made of it in the Hocking Valley, except as an element in 
the geological seale. 
The Freeport coals have not been mentioned in any of the more 
recent sections, but simply for the reason that their horizons have not 
been reached in these sections. The hill east of Roseville is the last 
point where they were recognized, but they sweep in absolutely un- 
broken outcrops through all the high grounds. We cannot measure a 
single section throughout this whole region in which there is any 
adequate exposure of the strata, without finding one or more elements, 
especially of the Upper horizon, shown. 
Shawnee furnishes a clear and excellent section. Its main elements 
are as follows: 
Ft. 
Coal and blackband ore—Upper Freeport, Iron Point ore (No. 7)... 3 
Bire-clayaand shale me cccccsessccccoseccsccusscccorsonc ences eeen meter 18 
Timestone—Upper Freeport, Shawnee limestone, worked largely 
Lor LUTMACES cs: ccs siscasees vencesmestiiee dee Caccesecineswacensecc ven teemoeeeetes 2 
Dn Gervais ccc neck ec S eee he oe eee Cee eee TT Se ce Cee 34 
