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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 54 (1984)No. 1. (March), Pages 151-153

Heavy Mineral Concentration at the Bottom of Polychaete Traces in Sandy Sediment

Thomas R. Clifton (2)

ABSTRACT

X-ray radiographs of box cores of shelf sand off the coast of California and Oregon show linear concentrations of grains opaque to X-rays. A number of the lines cross one another, suggesting that they are of biogenic origin. Experimental studies show that infaunal polychaetes such as Nephtys produce similar concentrations of heavy minerals as they move through sand. A similar origin is postulated for the observed concentrations in the shelf-sand box cores.


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