. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering Figure 19-4. Southeastern Bering Sea shelf: Abundance of gravel in surface sediment (%).. 11^. '0. SPND (7.) IS". â 54. â (). 'a^«6,16 4-'"-"/ ^-^ J^ / . " 19 84 y ^ V ~?s 60. â ^^." ^^^t^ i - -^\ + ' V X / « ^^..S ,^, -,' i S9. ⢠1 39 SD ^ 1^-^'' 4 ' ''* W _^ 0 26 + ° ^^ Xfl 1 58. ⢠^ 4-"-°= ? QQ 4 4. â f 87 410.'6§2, â *" _^ + 3j j3 _j_ + ^'-^^ ^ cw;0^ ^ 24. la ^ 30,
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering Figure 19-4. Southeastern Bering Sea shelf: Abundance of gravel in surface sediment (%).. 11^. '0. SPND (7.) IS". â 54. â (). 'a^«6,16 4-'"-"/ ^-^ J^ / . " 19 84 y ^ V ~?s 60. â ^^." ^^^t^ i - -^\ + ' V X / « ^^..S ,^, -,' i S9. ⢠1 39 SD ^ 1^-^'' 4 ' ''* W _^ 0 26 + ° ^^ Xfl 1 58. ⢠^ 4-"-°= ? QQ 4 4. â f 87 410.'6§2, â *" _^ + 3j j3 _j_ + ^'-^^ ^ cw;0^ ^ 24. la ^ 30,33 ^ ^ y^ 1 . /^ rA 10 ^, . ^ JZ} ^ ^ XV ^yjjfS^f*- ss. â _^ ^ 6 4 3° ^ Jo ⢠f K ^.- - Figure 19-5. Southeastern Bering Sea shelf: Abundance Figure 19-6. Southeastern Bering Sea shelf: Abundance of sand-sized sediment (%). of silt-sized sediment (%). sand content, well-sorted character, and consistent increase in mean size in depths shallower than ap- proximately 50 m reflect the proximity to the mainland sediment sources and the subsequent influence of wind waves and tidal, storm, and coastal currents. The sandy gravel, gravelly sand, and sand found in this southeastern shelf region are apparently being supplied by the bordering rivers: the Egegik, Naknek, Kvichak, Nushagak, and Kuskokwim Rivers are major contributors. Poorly to very poorly sorted sediment is present only close to shore. Gravel-sized material was obtained mostly in nearshore areas, especially in sediment from Bristol Bay proper, Kuskokwim Bay, and Unimak Pass. These sediments probably represent reworked fluvial or beach deposits, or, in isolated cases, relict or palimpsest deposits. The relative amounts of the silt component in the sediments over the entire south- eastern Bering shelf region range from to 50 percent with a mean content of around 20 percent. This component is dominant in the low-energy environment region of this southern shel
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