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Dinosaurs - Geology: the Cretaceous-Tertiary boundary (KT boundary) Sixty five million years ago an asteroid or cometFG-CC-144 Dinosaurs - Geology: the Cretaceous-Tertiary boundary (KT boundary) The site is in the Red Deer River Valley, Alberta, Canada
Dinosaurs - Geology: the Cretaceous - Tertiary boundary (KT boundary) Sixty five million years ago an asteroid or cometFG-CB-432 Dinosaurs - Geology: the Cretaceous - Tertiary boundary (KT boundary) Location: Red Deer River Valley, north of Drumheller, Alberta, Canada