Nature
Black Peak is a mountain on the Alaska Peninsula in southern Alaska and a highly eroded stratovolcano built around a lava dome complex. Also known as Purple Crater, Black Volcano, and Sopka Chornaia, it last erupted less than 4,000 years ago in a major explosive VEI 6 event that formed a caldera. That eruption sent ash-flow tuffs and block-and-ash-flow deposits down the Ash Creek and Bluff Creek valleys, where they reached depths of about 100 meters. Black Peak remains significant as both a volcanic landform and evidence of the Alaska Peninsula’s powerful eruptive past.
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Chignik Lagoon, Alaska · United States
