. 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. DEPTHS AND DEPOSITS OF THE OCEAN 173 Carinaria cithara, Benson. „ punctata, d'Orbigny. ,, gaudichaudii, Eydoux and Souleyet. ,, atlantica, Adams and Reeve. „ cornucopia, Gould. Atlanta peronii, Lesueur. „ turriculata, d'Orbigny. „ lesueurii, Eydoux and Souleyet. „ involuta, Eydoux and Souleyet. „ infiata, Eydoux and Souleyet. „ i?iclinata, Eydoux and Souleyet. ,, helicinoides, Eydoux and Soule- y
. 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. DEPTHS AND DEPOSITS OF THE OCEAN 173 Carinaria cithara, Benson. „ punctata, d'Orbigny. ,, gaudichaudii, Eydoux and Souleyet. ,, atlantica, Adams and Reeve. „ cornucopia, Gould. Atlanta peronii, Lesueur. „ turriculata, d'Orbigny. „ lesueurii, Eydoux and Souleyet. „ involuta, Eydoux and Souleyet. „ infiata, Eydoux and Souleyet. „ i?iclinata, Eydoux and Souleyet. ,, helicinoides, Eydoux and Soule- yet. ,, gibbosa, Eydoux and Souleyet. Atlanta gaudichaudii, Eydoux and Sou- leyet. ,, fusca, Eydoux and Souleyet. ,, depressa, Eydoux and Souleyet. ,, rosea, Eydoux and Souleyet. ,, quoyana, Eydoux and Soule- yet. ,, mediterranea, Costa. ,, violacea, Gould. ,, tessellata, Gould. „ primitia, Gould. „ cunicula, Gould. ,, souleyeti, Smith. Oxygyrus keraudrenii (Lesueur). ,, rangii, Eydoux and Souleyet. The gasteropod genus Ianthina is also pelagic, while the species of coccolithophoridae are very numerous. <Se«a Surf a. Fig. 142.—Diagram showing gradual disappearance of Calcium Carbonate with increasing depth. The distribution of the dead shells of these pelagic organisms in different depths is peculiar and remarkable. If we suppose a cone to rise from a depth of 4000 fathoms up to within half a mile of the surface far from land in the warmer regions of the ocean (see Fig. 142), we shall find on the upper surface of this cone, and down its sides to about 1000 fathoms, nearly every shell of pelagic organisms represented in the deposit, even the smallest and most delicate. At about 1500 fathoms Disappearance many of the thinnest and smallest shells will have disappeared, °L^on™te with and the Pteropod ooze passes gradually into Globigerina ooze, increase of At 2000 fathoms there may not be a trace of pteropods, and ept ' some of the more delicate foraminife
Size: 3223px × 776px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912
