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. This region is now called the Mohorovicic discontinuity. A crater on the dark side of the moon was also named for Mohorovicic. 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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