Archive image from page 195 of The depths of the ocean;. 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 depthsofoceange00murr Year: 1912 Fig. 132.—Spherule of Bronzite (¥). 'Challenger' Station 338, South Atlantic, 1990 fathoms. Fig. 133.—A Lamella of a Spherule of Bronzite (highly magnified). 'Challenger' Station 338, South Atlantic, 1990 fathoms. always associated with terrigenous mineral particles and rock- fragments, the decomposition of which, under


Archive image from page 195 of The depths of the ocean;. 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 depthsofoceange00murr Year: 1912 Fig. 132.—Spherule of Bronzite (¥). 'Challenger' Station 338, South Atlantic, 1990 fathoms. Fig. 133.—A Lamella of a Spherule of Bronzite (highly magnified). 'Challenger' Station 338, South Atlantic, 1990 fathoms. always associated with terrigenous mineral particles and rock- fragments, the decomposition of which, under the action of sea- water, would yield the chemical elements subsequently deposited in the form of glauconite in the chambers of foraminifera and other calcareous organisms. The excreta of echinoderms appear sometimes to be converted into glauconite.


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