Homotrema rubrum (Lamarck) is an excellent indicator of the direction of transport of sand-size carbonate sediments on the Bermuda Platform. The foraminifer lives mainly on the outer shoals surrounding the Platform. The distribution of Homotrema in the Bermuda sediments shows that sand-size, carbonate, shoal detritus is dispersed for long distances down the Bermuda slope but is not transported very far into the Bermuda lagoons.

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