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Avalon shale core consisting of interbedded mudstones (dark color) and carbonates (light color). Individual carbonate sediment gravity flow event beds are outlined in blue brackets. Carbonate intervals range from less than 3 centrimeters (one inch) to tens of centimeters thick and are commonly sharp based with gradational tops. They are composed of fine to very-fine sand-sized material with local accumulations of mud clasts (m.c.) interpreted to be mud rip-ups. Basal contacts are commonly scoured (Sc), and internal scours may also be present. Images courtesy of the department of Geology, University of Kansas
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Avalon shale core consisting of interbedded mudstones (dark color) and carbonates (light color). Individual carbonate sediment gravity flow event beds are outlined in blue brackets. Carbonate intervals range from less than 3 centrimeters (one inch) to tens of centimeters thick and are commonly sharp based with gradational tops. They are composed of fine to very-fine sand-sized material with local accumulations of mud clasts (m.c.) interpreted to be mud rip-ups. Basal contacts are commonly scoured (Sc), and internal scours may also be present. Images courtesy of the department of Geology, University of Kansas