. 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. "Michael Sars" North Atlantic Deep-sea Expedition (1910); Oceanography; North Atlantic Ocean. 154 DEPTHS OF THE OCEAN Extra- terrestrial materials. land in those regions of the ocean affected by floating icebergs. The dust from deserts, Hke volcanic dusts, may be carried by wind to great distances from land, and can be detected in deep- sea deposits, for instance, off the west coast of Africa. The m
. 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. "Michael Sars" North Atlantic Deep-sea Expedition (1910); Oceanography; North Atlantic Ocean. 154 DEPTHS OF THE OCEAN Extra- terrestrial materials. land in those regions of the ocean affected by floating icebergs. The dust from deserts, Hke volcanic dusts, may be carried by wind to great distances from land, and can be detected in deep- sea deposits, for instance, off the west coast of Africa. The materials of extra-terrestrial origin, though extremely interesting, do not bulk largely ^'^^^^m ^ h in marine de- ^'' posits ; indeed they are rather of the nature of rarities, and are noticed most abundantly in Red clay areas where, for many reasons, it is believed the rate of deposition is at a minimum. They consist of minute black metallic spherules and brown chondritic spherules, which may be extracted by the aid of a magnet when the Red clay deposit is reduced to a fluid condition by admixture of water. The black spherules (see Figs. 130 and 131) sometimes have a shining metallic. V Canna/'/a lamarckii. Per of this species are occasionally met with Fig. 122. and Les. (From Steuer.) The fragile shells deep-sea 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-; Appellöf, Jakob Johan Adolf, 1857-; Gran, H. H. (Haakon Hasberg), 1870?-; Helland-Hansen, Bjørn, 1877-. London : Macmillan
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