Geology. a 121 
show generally one workable bed, the Elklick coal, and sometimes two, 
above the Ma oning Sandstone. Mr. Lesley’s section has marked the 
place of these strata. In the same section of the report, there is a group 
of veins, called the Mercer coal, which has no equivalent in the other 
sections, or which is represented only by a thin coal. Paleontology alone 
can decide whether this Mercer coal is, or is not, the equivalent of No. 1 
and its subdivisions, as it appears to be. 
From all the local sections of the Pennsylvania Survey, two ascertained 
data are especially worth mentioning. Ist. The reliability of our Curlew 
Section 6th was made at Buena Vista and Greenup furnaces from m 
mea compared with five different sections, kindly furnished 
wn ts, 
by Mr. John Means. 
ered, and its paleontology was not ascertained, I have no doubt of its 
htity with the Haddock’s coal, our No. 8, which is worked in the 
and paleontological data. Coal 3d is only marked by a bed of hard fire 
clay, nearly limestone, or bastard limestone, and a streak of coal, and coal 
4th is replaced by fire clay and iron ore, just at the base of the Mahoning 
Sandstone, which tops the hills, 520 feet above low water of Louisa river, 
4nd is conglomeratic at its top. 
a 
ures, apparently shales and iron stone. I could find no trace of coal 4th; 
t the 
tion 12th was taken at W ‘ . 
anthracite basin, This and the following sections are copied from the 
Jour. Scl.—Szconp SERiEs, VOL. No, 94. 
16 - , 
Ogee ead alma ‘ 
