a rate i iia aot 
- 
Miscellanies. 189 
IX.—Red sandstones and shales of the S. E. slope and’ base of the Alleghany 
mountain. 
X.—Sandstones and conglomerates of the Second mountain, and of the S. E. 
summit “a si Alleghany. 
shale of the anthracite coal regions. 
XII—c Conde and sandstones immediately below the coal measures of 
the anthracite, the Broad Top and the Alleghany coal region. 
XIII.—The anthracite coal measures 
General observations and concluding remarks. 
This survey is detailed, both topographically and geologically, 
and we doubt not it is exact. Prof. Rogers has, in the main, 
avoided theoretical speculations, and comparisons with European 
systems and equivalents, wisely reserving these things for his 
general digest when his labor is through. Still, his remarks upon 
the anthracite coal beds furnish some bold and decisive speecula- 
tions as to elevations and other movements, which, however start- 
ling they may appear to an uninitiated mind, are without doubt 
founded in sound principles of geological dynamics, and we believe 
are substantially true. Having had some opportunity to examine 
parts of those vast coal fields, we have seen enough of the evi- 
dence of the exertion of irresistible, elevatory, disrupting and 
compressing or sliding forces, to convince us that no assumptions 
of that nature are in this region in the smallest danger of being 
extravagant ; and it remains only to infer by just induction from 
the phenomena, the particular modus operandi in which the power 
has acted to produce its indubitable effects. Prof. Rogers has 
been zealously and efficiently assisted in his labors by Messrs. 
Samuel 8. Haldeman, Alexander M’Kinley, Charles B. Trego, and 
James D. Whelpley, and in the chemical department by his 
brother, Dr. Robert E. Rogers. The sub-assistants were Messrs. 
Alfred F. Darley, Edwin Haldeman, Horace Moses, and Peter 
W. Scheeffer. This able report is comprised within ninety three 
pages, and is furnished with a glossary, and a shaded sectional 
arrangement of the strata, in the following ascending order, be- 
ginning upon the common basis of the primary rocks. The con- 
tents of each perecalee formation are given in the descending 
order. 
7 -Cc i ag 2 sandstone—. eet. 
—Blue limestone, with beds of chert, and a few fossilsp—6000? 
if .—Roofing slates, dark slates, and argillaceous sandstones, a vf bed 
of Ii 
IV.—White sandstone, fucoides—1800 feet. 
