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Difference between revisions of "Mount Berlin"
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Individual volcanic eruptions at Berlin occurred 135,600 ± 900 years ago, 118,100 ± 1,300 years ago, 92,100 ± 900 years ago, which was the origin of the so-called marine "Tephra A," 14,500 ± 3,800 and 10,300 ± 5,300 years ago. Two pyroclastic deposits in the Berlin crater wall are dated 25,500 ± 2,000 and 18,200 ± 5,800 years ago. Over time, volcanic activity migrated south-southwestward. Berlin further had volcanic activity in the Holocene, including a lava flow beneath an ice tower that is dated 10,300 ± 2,700 years ago. A tephra dated 7,756 BC is similar to a lava flow from Mount Berlin in terms of composition and may originate from an eruption there. Another similar tephra is dated 9,346 BCE. | Individual volcanic eruptions at Berlin occurred 135,600 ± 900 years ago, 118,100 ± 1,300 years ago, 92,100 ± 900 years ago, which was the origin of the so-called marine "Tephra A," 14,500 ± 3,800 and 10,300 ± 5,300 years ago. Two pyroclastic deposits in the Berlin crater wall are dated 25,500 ± 2,000 and 18,200 ± 5,800 years ago. Over time, volcanic activity migrated south-southwestward. Berlin further had volcanic activity in the Holocene, including a lava flow beneath an ice tower that is dated 10,300 ± 2,700 years ago. A tephra dated 7,756 BC is similar to a lava flow from Mount Berlin in terms of composition and may originate from an eruption there. Another similar tephra is dated 9,346 BCE. | ||
LeMasurier | In 1990, [[Wesley E. LeMasurier]] identified the volcano as "potentially active". Fumarolic activity has formed ice towers that emit steam, making it the only volcano in [[Marie Byrd Land]] with ongoing geothermal activity.One ice cave associated with an ice tower had rock temperatures measured at 12 °C (54 °F). These fumarolic phenomena all occur along the northern and western rims of the Berlin Crater. Volcano-tectonic earthquakes have been identified at Mount Berlin. They occur at depths of 15–20 kilometres (9.3–12.4 mi). | ||
==Duchy of Moulton-Berlin== | ==Duchy of Moulton-Berlin== | ||