Filters: Tags: tide-influenced delta (X)
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The lower part of the Cretaceous Sego Sandstone Member of the Mancos Shale in east-central Utah contains three 10- to 20-m thick layers of tide-deposited sandstone arranged in a forward- and then backward-stepping stacking pattern. Each layer of tidal sandstone formed during an episode of shoreline regression and transgression, and offshore wave-influenced marine deposits separating these layers formed after subsequent shoreline transgression and marine ravinement. Detailed facies architecture studies of these deposits suggest sandstone layers formed on broad tide-influenced river deltas during a time of fluctuating relative sea-level. Shale-dominated offshore marine deposits gradually shoal and become more sandstone-rich...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Cretaceous,
Sedimentology,
Sego Sandstone,
falling stage,
incised valley,
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