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During glaciations, the shelves down to ~100m depth would have been above sea level, but they would have been covered by ice sheets. Geology.com The actual "ocean floor" would still be deep water. There is a general explanation of the oil formation here and here, although they don't say when (or where the continents were when the sediments were deposited), ...


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It is not only Milankovic cycles, these are often overrated. Starting in the Cretaceous, thoughout the Paleo- and Neogene the world went from a greenhouse to an ice age that culminated in the Pleistocene. Much is attributed to the arrangement of continents (large landmass to the southpole), change in ocean currents, and slow accumulation of ice shields and ...


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The jaguar is a close relative of the Asiatic leopard and must have had a common ancestor within the last 5 million years. The South American tapir is obviously closely related to the Malayan tapir and must also have had a common ancestor within he last 5 million years. While the first statement is more or less correct, the latter is not. The Asian and ...


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