. The story of the earth and man [microform]. Geology; Paleontology; Man; Géologie; Paléontologie; Homme. 30 THE STOET OP THE EARTH "AND lil morphism took place, and at lengtli the tension ' becoming too great to be any longer maintained, a second great collapse occurred, crumpling and dis- turbing the crust, and throwing up vast masses of the Laurentian itself, probably into lofty mountains —many of which still remain of considerable height, though they have been subjected to erosion through- out all the extent of subsequent geological time. The Eozoic age, whose history we have th
. The story of the earth and man [microform]. Geology; Paleontology; Man; Géologie; Paléontologie; Homme. 30 THE STOET OP THE EARTH "AND lil morphism took place, and at lengtli the tension ' becoming too great to be any longer maintained, a second great collapse occurred, crumpling and dis- turbing the crust, and throwing up vast masses of the Laurentian itself, probably into lofty mountains —many of which still remain of considerable height, though they have been subjected to erosion through- out all the extent of subsequent geological time. The Eozoic age, whose history we have thus shortly sketched, is fertile in material of thought for the geologist and the naturalist. Until the labours of Murchison, Sedgwick, Hall, and Barrande had de- veloped the vast thickness and organic richness of the Silurian and Cambrian rocks, no geologist had any idea of the extent to which li% had reached backward in time. But when this new and primitive world of Si^'iria was unveiled, men felt assured that they had now at last reached to the beginnings of life. The argument on this side of the question was thus put by one of the most thoughtful of English geologists, Professor Phillips : " It is ascertained that in passing , downwards through the lower Palaeozoic strata, the forms of life grow fewer and fewer, until in the lowest Cambrian rocks they vanish entirely. In the thick series of these strata in the Longmynd, hardly any traces of life occur, yet these strata are of such a kind as might be expected to yield them. . The materials are fine-grained or arenaceous, with or with- out mica, in laminae or beds quite distinct, and of various thicknesses, by no means unlikely to retain. 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 Dawson, J. W. (John William), Sir, 1820-1899. Toronto : Copp Cl
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