. Elements of geology. Geology. Catcareolis nodules in Lias. Fig, Spheroidal concretions in magnesian limestone. tion (Fig. 52.) passes from the stra- tum b upwards into a. In this instance we must suppose the depo- sition of a series of minor layers, first forming the stratum and afterwards the incumbent stratum a; then a movement of the particles * Principles of Geology, Index, " Superior, ; t See De la Beche's Geological Researches, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorat


. Elements of geology. Geology. Catcareolis nodules in Lias. Fig, Spheroidal concretions in magnesian limestone. tion (Fig. 52.) passes from the stra- tum b upwards into a. In this instance we must suppose the depo- sition of a series of minor layers, first forming the stratum and afterwards the incumbent stratum a; then a movement of the particles * Principles of Geology, Index, " Superior, ; t See De la Beche's Geological Researches, p. 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