. The Earth beneath the sea : History . Fig. 8. Zonal growth in manganese nodule (16810, South Pacific). Reflected light, ^^^lite = manganese oxide minerals; grey = goethite; black = mounting medium (polyvinyl resin) filling voids. goethite content (Figs. 8 and 9). Detailed information on the distribution of macroscopic concretions over the present sediment sm'face has been obtained through deep-sea bottom photography (Fig. 5) such as by Owen, Shipek, Menard and Dietz in Dietz (1955), Menard and Shipek (1958), Heezen et al. (1959), Shipek (1960), and Zenkevitch (1959), and by sampling of the s
. The Earth beneath the sea : History . Fig. 8. Zonal growth in manganese nodule (16810, South Pacific). Reflected light, ^^^lite = manganese oxide minerals; grey = goethite; black = mounting medium (polyvinyl resin) filling voids. goethite content (Figs. 8 and 9). Detailed information on the distribution of macroscopic concretions over the present sediment sm'face has been obtained through deep-sea bottom photography (Fig. 5) such as by Owen, Shipek, Menard and Dietz in Dietz (1955), Menard and Shipek (1958), Heezen et al. (1959), Shipek (1960), and Zenkevitch (1959), and by sampling of the sediment surface (Skornyakova, op. cit.). Large nodules and crusts appear to accrete on topographic highs, or in other areas with a low total rate of deposition, where the growing nuclei are not buried by other sedimentary components. The rate of accretion was in the range of 10^ to 10^^ cm year~i in a nodule investigated by von Buttlar and Houtermans (1950) apjjlying the results of Goldberg and
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom
