. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. Oceanography. 152 DEPTHS OF THE OCEAN distributed over the ocean-floor, the latter being derived from the disintegration of continental land through atmospheric and physical agencies and distributed in comparatively close proximity Volcanic to that land. Of volcanic products the most characteristic is products. pumjce> which may float for a long time in the surface waters of. Fig. i 20. Hastigeri?ia pelagic
. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. Oceanography. 152 DEPTHS OF THE OCEAN distributed over the ocean-floor, the latter being derived from the disintegration of continental land through atmospheric and physical agencies and distributed in comparatively close proximity Volcanic to that land. Of volcanic products the most characteristic is products. pumjce> which may float for a long time in the surface waters of. Fig. i 20. Hastigeri?ia pelagica, d'Orbigny. From the surface (\°). the ocean and may be carried far from its original source before finally becoming water-logged and sinking to the bottom. While floating on the surface these stones are knocked against one another by the waves, and the broken-off fragments fall to the bottom. Three varieties of pumice have been recognised among the fragments from the sea-bottom : liparitic, basaltic. 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 Murray, John, Sir, 1841-1914; Hjort, Johan, 1869-. London Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912
