. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . Figure 66-3. Distribution of sand fractions in tiie soutiieastern Bering Sea. Freeman (Feder et al. 1980, Feder and Jewett 1980) (Fig. 66-7). A stainless steel screen with a mesh of 1 mm^ was inserted at the base of the pipe dredge on sandy bottom; screen with a mesh of 2 mm^ was used on fine sediments. Samples were washed over a 1-mm^ screen. Sediments collected from van Veen grab samples were analyzed by Hoskin (1975,1978).' Values, based on Hoskin (1975, 1978), of mean sediment size,
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . Figure 66-3. Distribution of sand fractions in tiie soutiieastern Bering Sea. Freeman (Feder et al. 1980, Feder and Jewett 1980) (Fig. 66-7). A stainless steel screen with a mesh of 1 mm^ was inserted at the base of the pipe dredge on sandy bottom; screen with a mesh of 2 mm^ was used on fine sediments. Samples were washed over a 1-mm^ screen. Sediments collected from van Veen grab samples were analyzed by Hoskin (1975,1978).' Values, based on Hoskin (1975, 1978), of mean sediment size, distribution of gravel, percentage of sand, percentage of mud, and sorting characteristics are included in Table 66-1 (see also Fig. 66-7 and Table 66-2), and illustrated in Figs. 66-2 to 66-6. The infauna taken by van Veen grab was analyzed by Feder et al. (1980) and Haflinger (1978); the data are The grade scale often used in tiie past for sediments is thie Wentwortii scale, a logaritiimic scale of sizes in millimeters. The 0 scale, devised by Krumbein (see Pettijohn 1957) is a much more convenient way of presenting data and is used almost entirely in recent work. Phi (0) is the negative logar- ithm (to the base 2) of the diameter of particles. To avoid negative numbers for the various sand grades and finer material the log was multiplied by —1, or phi = 2~log2 diameter (mm). Phi values represent the inverse of any mean sediment size, , gravel = > -10 (Folk 1974, Folk and Ward 1975, Pettijohn 1957) (Tables 66-1 and 66-2).
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