Buttress unconformity in Ogden Canyon, Utah: two rock units separated by 1.8 billion years of time!
Автор: Shawn Willsey: Geology Explained
Загружено: 2022-07-03
Просмотров: 8675
Join geology professor Shawn Willsey in Ogden Canyon, Utah as he investigates an interesting type of unconformity called a buttress unconformity where sediments are deposited against a topographic feature. In this case, 1.8 billion year old metamorphic rock is juxtaposed against ~20,000 year old gravel from when the Ogden River fed directly into Lake Bonneville, prior to the Bonneville Flood and during the Pleistocene ice age. This unconformity or contact between these two adjacent rock units represents more time than the Great Unconformity, which is also exposed in the canyon and elsewhere in the Wasatch Mountains.
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Shawn Willsey
College of Southern Idaho
315 Falls Avenue
Twin Falls, ID 83303
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