Anthracite formation of Wilkesbarre, &. 5 
On the height of land, the veins of coal are more level 
than in our valley, where the strata dip from the height of 
= hundred feet, at an angle of from 10 to 35°, towards the 
er on both sides, inducing a belief that the valley has been 
formated by the sinking of the surface. 
The coal alternates with schist, argillite or thonschiefer, 
micaceous slate, (5,) and preneao sand stone, (6 ;) which 
last is in strata from five to one hundred feet thick, a coal 
itself forming veins of from thirty to forty feet deep, though 
the general thickness is from twelve to fifteen feet. The 
deposition of vegetable matter to have formed such masses 
of coal, making allowance for its compression, must have 
_ enormous. You will not fail to remark that the mice 
slate i — fees ane the apeeemaateece: is, 
tis ofrerye ory — i ss 
fourths of which a are ieee of granite, sie sienite, porphyry, pri- 
mitive limestone, chert, hornstone, petrosilex, &c. ; although 
for one hundred and twenty miles above this, not one primi- 
itive rock is to be seen on either side of the river, whilst 
the entire bed of the river, as far up as I have been, is 
composed principally of the above primitive stones brought 
down the river, and rounded by attrition. This bed of 
ea _—- extends to a considerable an on each 
side of the river, is, in many places eager eet above 
its present level. The alluvion of aati is a “ed 
lo 
About forty cites: stove, to rt W. a poke a sen 
calcaseee matter, eving the essions of the shel in 
the sand. A specimen this wre dy down by the river 
is marked.* 
+. Wish & tos pe a ot ke Tictin 
- 2 J Set et 
