1 янв 48000000 г. до нашей эры - The earliest phase of uplift of the Appalachian Mountains
Описание:
The Appalachians first formed roughly 480 million years ago during the Ordovician Period, and once reached elevations similar to those of the Alps and the Rocky Mountains before they were eroded.
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1 янв 48000000 г. до нашей эры
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