Long Jawed Mastodons stood about 4 1/2 ft high, had four tusks and lived in the Oligocene epoch (from about 33.7 to 23.8 million years ago), part of the Tertiary Period in the Cenozoic Era.
During the Oligocene epoch, the first Mastodons lived in Africa and their larger descendants spread over Asia, Europe and finally to Northern America about 15 million years ago in the Miocene (23.8 to 5.3 million years ago.) The last Long-jawed Mastodons lived in North America and became extinct near the end of the Pleistocene (1.8 million to 11,000 years ago)
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