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Showing 1 to 1 of 1 for “"paleocanyon"”.
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Timing of erosional episodes in the Marble Canyon and Vermilion Cliffs region from apatite (U-Th)/He thermochronology
… 30 Ma, precluding the presence of a 50-70 Ma paleocanyon. Intermediate elevation samples on the Kaibab rim of Marble Canyon show rapid 30-15 Ma cooling due to regional denudation as the Cretaceous section was eroded, but the pattern of cooling reflects carving of a 25-15 Ma paleocanyon across …