Hell's Half Acre Vulkan
Schildvulkan 1631 m / 5,351 ft
Idaho, USA (mainland exept Alaska), 43.5°N / -112.45°W
Aktueller Status: normal / ruhend (1 von 5) | Berichte
Hell's Half Acre Vulkan-B cher
Idaho, USA (mainland exept Alaska), 43.5°N / -112.45°W
Aktueller Status: normal / ruhend (1 von 5) | Berichte
Hell's Half Acre Vulkan-B cher
Typische Aktivität: effusiv
Ausbrüche des Hell's Half Acre: 3250 BC ± 150 years
Ausbrüche des Hell's Half Acre: 3250 BC ± 150 years
| Uhrzeit | Mag. / Tiefe | Distance | Ort |
Beschreibung:
Hell's Half Acre consists of a low basaltic lava shield with predominantly pahoehoe lava. Most eruptions took place from a 3-km-long, NW-SE trending vent system at the NW part of the field.The summit vent area contains an irregular, elongate 0.8 x 0.3 km wide central caldera which contained a lava lake. There are about 10 circular pit craters on the lava lake and 2 prominent lava tube systems near the summit.
2 major lava flows, each about 5 km wide and 10 km long, extend to the south and SW along the flood plain of the Snake River and surround Morgans Pasture, a large kipuka (island spared by the lava flows). Interstate 15 highway crosses the SE margin of the lava field SW of the city of Idaho Falls.
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