Miscellanies, 189 



IX. — Red sandstones and shales of the S. E. slope and hase of the Alleghany 

 mountain. 



X. — Sandstones and conglomerates of the Second mountain, and of the S. E. 

 summit of the Alleghany. 



XI. — Red shale of the anthracite coal regions. 



XII. — Conglomerates 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, v/hich, 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 S. 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. Schasfler. 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 particular formation are given in the descending 

 order. 



I. — Compact white sandstone — 1000 feet. 



II. — Blue limestone, with beds of chert, and a few fossils — 6000? feet. 

 III. — Roofing slates, dark slates, and argillaceous sandstones, a few fossils, bed 

 of limestone — 6000 feet. 



IV. — White sandstone, fucoides — 1800 feet. 



