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Book Chapter

Relations Between Cross-Bedding, Bedforms, and Flow

Published:
January 01, 1987

Abstract

The usefulness of cross-bedding as a flow indicator results from the connections between cross-bedding, bedforms, and flow conditions. As a result of empirical and theoretical studies in the past few decades, it is now possible to predict crudely what bedform morphology results from flow conditions for many two-dimensional flows that are steady through time and uniform through space and for many two-dimensional oscillatory flows. Eventually, it may become possible to predict bedform morphology and behavior accurately for more complicated flows such as those that vary in strength or direction or the geologically more important flows that decelerate downcurrent (Rubin and Hunter, 1982). Ultimately, it may be possible to use cross-bedding to recreate current-meter-type records of paleocurrent directions and velocities. Even without quantitative fluid dynamics models, however, it is possible to infer bedform morphology and behavior from cross-bedding and to relate those interpreted characteristics qualitatively to flow conditions. The following section considers the controls of flow on bedform morphology and behavior and considers some of the general properties of the cross-bedding that is produced.

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Contents

SEPM Concepts in Sedimentology and Paleontology

Cross-Bedding, Bedforms, and Paleocurrents

David M. Rubin
David M. Rubin
U.S. Geological Survey, Santa Cruz, California
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Carissa L. Carter
Carissa L. Carter
U.S. Geological Survey, Santa Cruz, California
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SEPM Society for Sedimentary Geology
Volume
1
ISBN electronic:
9781565761018
Publication date:
January 01, 1987

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