. The elements of geology, for popular use : containing a description of the geological formations and mineral resources of the United States. Geology; Geology. BITUMINOUS COAL MEASURES. 245. Bituminous Coal Measures* These differ chiefly from the anthracite coal meas- ure in containing more frequent beds of limestone, marl, clay, and, perhaps, iron ore. We cannot present a more intelligible view of the bituminous coal measures of the United States, than by giving the following Section of the Carboniferous System of Ohio, by Lieut. Mather. Feet. Fig. 44 _ =H Upper coal series. |jG Calcareo-sil
. The elements of geology, for popular use : containing a description of the geological formations and mineral resources of the United States. Geology; Geology. BITUMINOUS COAL MEASURES. 245. Bituminous Coal Measures* These differ chiefly from the anthracite coal meas- ure in containing more frequent beds of limestone, marl, clay, and, perhaps, iron ore. We cannot present a more intelligible view of the bituminous coal measures of the United States, than by giving the following Section of the Carboniferous System of Ohio, by Lieut. Mather. Feet. Fig. 44 _ =H Upper coal series. |jG Calcareo-silicious rock. IF Lower coal series. 80 ^*^/i;**i:V^35E Conglomerate. 300; D Waverley sandstone series. C Slaty argillaceous rock, con- taining pyrites, &c. B Great limestone deposite. " For convenience of description," says Mr. Briggs, I the above strata have been separated into seven groups or subdivisions, which, it is believed, corre- spond with important eras or changes during this ; I. The first subdivision (marked B) includes the limestone of Adams and Highland counties, and is, probably, merely a continuation of that which forms the rocky strata of the whole western portion of the state. This limestone is of great thickness, and contains, where it has been examined, the petrified exuviae of radiated and molluscous animals of ma- rine origin, some of which belong to extinct Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lee, Charles A. (Charles Alfred), 1801-1872; Draper, Daniel, 1841-1931, donor. DSI. New-York : Harper & Brothers
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