. Elements of geology. Geology. PART II. CHAPTER XIV. 179 Eocene Strata Fossil Shells. The overlying Eocene deposit consists of two portions; the upper of blue clay, with occasional cement stones, as before mentioned; the lower of various coloured sands and clays; the fossils throughout all the beds being very different from those of the crag. Scarcely any one of the shells can be identified with species now living; and the whole assemblage is such as to resemble the testaceous fauna of the tropics. This opinion is favoured by the occurrence of many species of Mitra and Voluta, a large Cyprae,
. Elements of geology. Geology. PART II. CHAPTER XIV. 179 Eocene Strata Fossil Shells. The overlying Eocene deposit consists of two portions; the upper of blue clay, with occasional cement stones, as before mentioned; the lower of various coloured sands and clays; the fossils throughout all the beds being very different from those of the crag. Scarcely any one of the shells can be identified with species now living; and the whole assemblage is such as to resemble the testaceous fauna of the tropics. This opinion is favoured by the occurrence of many species of Mitra and Voluta, a large Cyprae, a very large Rostellaria, and shells of the genera FOSSIL SHELLS OF THE LONDON CLAY. Fig. 137. Fig. one third of nat. size. Fig. 140. Fig. 141. Fig. 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; Gibbes, Lewis Reeve, 1810-1894, former owner. DSI; Merrill, George P. (George Perkins), 1854-1929, former owner. DSI. Philadelphia : James Kay, Jun. and Brother ; Pittsburgh : C. H. Kay & Co.
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Keywords: ., bookauthorlyellcharlessir17, bookcentury1800, booksubjectgeology
