Abstract

The Carmel Formation, a marginal marine deposit of fine clastics and gypsum, exhibits cyclic deposition in eastern Utah. The cycles are well developed and consist of three divisions: a lower reduced unit of shales, siltstones, and platy limestones, an oxidized middle member of silty shale, and a top member of irregularly bedded gypsum. The probable cause of the cycles is a slow regression of the sea combined with minor periodic advances. Climatic changes are proposed as the mechanism for the readvances of the sea. The Carmel cycles are compared with somewhat similar deposits within the Moenkopi Formation in Arizona.

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