page_title: Mount Hampton
section_title: Geography and geology
hierarchical_section_title: Mount Hampton / Geography and geology
context_page_description: Mount Hampton is a shield volcano with a circular ice-filled caldera. It is a twin volcano with Whitney Peak to the northwest and has erupted phonolite rocks. It is the northernmost of the volcanoes which comprise the Executive Committee Range in Marie Byrd Land, Antarctica and was active during the Miocene. However, there is also evidence of recent fumarolic activity.
context_section_description: Mount Hampton is the northernmost volcano of the Executive Committee Range in Marie Byrd Land, Antarctica. It has the form of a symmetrical uneroded shield volcano with an "impressive" appearance and an ice-filled 5 kilometres (3.1 mi) wide caldera. Like other volcanoes in the Executive Committee Range, it is a paired volcano with the northwesterly 3,003 metres (9,852 ft) high Whitney Peak and the southeasterly 3,323 metres (10,902 ft) high Marks Peak, which is the main summit of Mount Hampton. The northwesterly summit is associated with its own caldera, which is partly cut by the Mount Hampton caldera on the southeastern flank and buried by the lava flows from the latter. The centres of the two calderas are about 8 kilometres (5.0 mi) apart. Based on outcrops, it appears that most of the volcano is formed by flow rocks but cinder and lava bombs occur at parasitic vents.
  The mountain rises about 1 kilometre (0.62 mi) above the surface of the West Antarctic Ice Sheet which buries most of the edifice, and moraine ridges are found at its base on the ice sheet. Owing to climate conditions, the persistence of permanent ice atop of the mountain is unlikely over the long term; erosion there appears to have been episodic with maxima during interglacials and there is no evidence of cirque formation. Lichens have been found on the mountain.
caption: Topographic map of Mount Hampton (1:250,000 scale) from USGS Mount Hampton
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