The Miocene epoch was a geologic time span that lasted from 24 million to 5 million years ago. Kelp forests appeared in the seas. The Bering land bridge formed during the Miocene, connecting Russia and Alaska, allowing many animals to migrat across continents. The Isthmus of Panama also formed during this time. A monogenetic volcano is one that was formed during a relatively short time period and during a single eruption.
Most monogenetic volcanos are basaltic.
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