"It was covered by the waters of the Gulf of Mexico until about 50 million years ago." Back during the Cretaceous Period, some 144 million to 66 million years ago, the Gulf of Mexico rose to its ...
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Most Detailed Geologic Map Of The US To Date Lets You Explore Country’s Ancient History
Ever wanted to know more about the ground beneath your feet? Well, thanks to a new geologic map of the lower 48 states of the USA, now you can – and in more detail than ever before. Geologic maps are ...
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