. The Earth beneath the sea : History . Stn. 3737 5280 m 10 DEPTH 1 10 O BELOW SURFACE /, cm Fig. 38. Disturbance of the surface sediment by bottom-living animals at three stations in a deep-ocean basin, measured from bottom photographs and core sections. Abscissa—Depth {z cm). Ordinate—Mean concentration of surface material at depth ;: for unit mass per unit area on the surface ('"/'"o f'^i ~^)- holes l^:':-:-:-:-:-:-! mOunds tracks I I galleries determine first of all the faunal populations. The extent of the disturbance due to their activity will depend on the hardness and composi
. The Earth beneath the sea : History . Stn. 3737 5280 m 10 DEPTH 1 10 O BELOW SURFACE /, cm Fig. 38. Disturbance of the surface sediment by bottom-living animals at three stations in a deep-ocean basin, measured from bottom photographs and core sections. Abscissa—Depth {z cm). Ordinate—Mean concentration of surface material at depth ;: for unit mass per unit area on the surface ('"/'"o f'^i ~^)- holes l^:':-:-:-:-:-:-! mOunds tracks I I galleries determine first of all the faunal populations. The extent of the disturbance due to their activity will depend on the hardness and composition of the bottom, and on the rate of sedimentation in raising the surface of their habitation. E. Description of Microtopograx)hy by Physiographic Regions a. Continental shelves (Figs. 13, 20, 22, 34) According to the classification of Heezen, Tharj) and Ewing (1959) the continental margin can be divided into three categories, the first category consisting of the continental shelf, the second the epicontinental marginal seas and the last the marginal plateaus. These regions have been more closely studied i^hotographically than any of the deeper ones since the bottom is more accessible. Early work on underwater photography by Ewing, Vine and
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom
