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Shaw's team proposed that the rhythmic Touchet beds are the result of multiple pulses, or surges, within a single larger flood. In response, Atwater's team observed that there is substantial evidence for periods of nondeposition and subaerial exposure lasting decades in duration between flood events, including mud cracks and animal burrows in the lower Touchet beds which were filled by sediment from later floods. The Evidence for periods of nondeposition and subaerial exposure between the deposition of individual beds have been further documented

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