Brushy Butte

sopka (bez známé erupce za posledních ~12 000 let), United States, North America Volcanic Regions

Kde

United States, North America Volcanic Regions

Typ (GVP)

Shield

Nadmořská výška

1 168 m

Poloha

41,178°, -121,445°

Brushy Butte forms a small shield complex immediately east of Timbered Crater, SSE of the Medicine Lake Highlands. The Brushy Butte complex has produced a broad apron of basaltic lava flows with fresh-looking flow features that extends preferentially down the regional gradient to the south as far as the Falls River valley. Soil development and degree of revegetation suggested a Holocene age similar to that of Hat Creek flow to the south (Peterson and Martin, 1980), and Miller (1989) also mapped Brushy Butte as Holocene. The Hat Creek flow, however, has been dated at 24,000 +/- 6,000 years (Clynne and Muffler, 2010). Brushy Butte flows are overlain by the Giant Crater lava flow from Medicine Lake caldera, which has a calibrated age of 12,430 years BP (Donnelly-Nolan, 2010), and Brushy Butte is considered to have formed between about 12,000 and 25,000 years ago (Smith, 2014 pers. comm.).

Text: Smithsonian Global Volcanism Program.

Údaje o sopce: Smithsonian Global Volcanism Program. Další sopky a průduchy.