. Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments. Geology. Fig. 502. Palceoniscus comptus, Agassiz. Scale, magnified. Marl-slate. Fig. 503. JPalceoniscus elegans, Sedg. Under surface of scale, magnified. Marl-slate. Fig. 504. Palceoniscus glaphyrus, Ag. Under surface of scale, magnified. Marl-slate. Fig. 505. Ccelacanthus granulatus, Ag. Granulated surface of scale, magnified. Marl-slata Fte. 506. Fig. Pygopterus mandibularis, Ag. Marl-slate. a. Outside of scale, magnified. &. Under surface of same. Acrolepis Sedgw
. Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments. Geology. Fig. 502. Palceoniscus comptus, Agassiz. Scale, magnified. Marl-slate. Fig. 503. JPalceoniscus elegans, Sedg. Under surface of scale, magnified. Marl-slate. Fig. 504. Palceoniscus glaphyrus, Ag. Under surface of scale, magnified. Marl-slate. Fig. 505. Ccelacanthus granulatus, Ag. Granulated surface of scale, magnified. Marl-slata Fte. 506. Fig. Pygopterus mandibularis, Ag. Marl-slate. a. Outside of scale, magnified. &. Under surface of same. Acrolepis SedgwicMi, Ag. Outside of scale, magnified. Marl-slate. The inferior sandstones (No. 6, Tab., p. 458), which lie beneath the marl-slate, consist of sandstone and sand, separating the magnesian limestone from the coal, in Yorkshire and Durham. In some in- stances, red marl and gypsum have been found associated with these beds. They have been classed with the magnesian limestone by Pro- fessor Sedgwick, as being nearly coextensive with it in geographical range, though their relations are very In some regions we find it stated that the imbedded plants are all specifically identical with those of the carboniferous series ; and, if so, they probably be- long to that epoch; for the true Permian flora appears, from the researches, of MM. Murchison and de Yerneuil in Eussia, and of MM. Geinitz and Yon Gutbier in Saxony, to be, with few exceptions, dis- tinct from that of the coal (see p. 463).. 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 Lyell, Charles, Sir, 1797-1875. New York, D. Appleton and co.
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectgeology, bookyear1868
