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Diamond Craters

火山原 · United States · 1435m

Lava flows of West Dome, one the structural highpoints of Diamond Craters, rise NE of lake-filled Malheur Maar. The shallow 2-m-deep lake occupies one of many maars (the rest of which are dry) of the Diamond Craters volcanic field at the time of this 2002 photo. Diamond Craters consists of a 70 km2 area of basaltic lava flows, scoria cones, and maars. The initial eruptions of pahoehoe lava flows and later activity involved magma injection that produced six structural highs of up to 150 m.
Lava flows of West Dome, one the structural highpoints of Diamond Craters, rise NE of lake-filled Malheur Maar. The shallow 2-m-deep lake occupies one of many maars (the rest of which are dry) of the Diamond Craters volcanic field at the time of this 2002 photo. Diamond Craters consists of a 70 km2 area of basaltic lava flows, scoria cones, and maars. The initial eruptions of pahoehoe lava flows and later activity involved magma injection that produced six structural highs of up to 150 m. · 写真: Photo by Lee Siebert, 2002 (Smithsonian Institution). · Wikimedia Commons
タイプ
火山原
国
United States
地域
North America Volcanic Regions / High Lava Plains Volcanic Province
標高
1435m
座標
43.100, -118.750
最終噴火
-5610年
テクトニクス環境
Rift zone / Continental crust (> 25 km)
火山地形
Cluster
主要岩石
Basalt / Picro-Basalt
地質学的概要

Diamond Craters volcanic field consists of a 70 km2 area of basaltic lava flows along with numerous cinder cones and maars located between the SE Oregon town of Burns and Steens Mountain. A basaltic pahoehoe lava field is overlain by deposits from phreatomagmatic and Strombolian eruptions that formed a late-stage central vent complex of about 20 craters and cones that densely fill a 1.1 x 1.6 km caldera. The age is constrained to within 7,320-7,790 calibrated years Before Present by radiocarbon-dated floodplain deposits below the lava flows and paloemagnetic evidence (Sherrod et al., 2012). Doming has created a series of six overlapping topographic highs. The highest of these is known as Graben Dome; its summit is cut by a NW-SE graben 0.4 x 2.1 km long and 30 m deep. Lava flows on the E side of the field, scattered cinder cones, and maars formed during the last stage of activity.

Wikipedia の要約

英語版の要約

The Diamond Craters is a monogenetic volcanic field about 40 miles (64 km) southeast of Burns, Oregon. The field consists of a 27-square-mile (70 km2) area of basaltic lava flows, cinder cones, and maars. The reexamination of radiocarbon dates from older studies and interpretation of paleomagnetic data and new radiocarbon dates limits the eruption of volcanic vents in this volcanic field to the time period between 7320 and 7790 calendar years B.P.

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噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
5610 BCE~5610 BCE · 1件 · 最大 VEI 45610 BCE5610 BCE5609 BCE5609 BCE5609 BCE

詳細タイムライン

  1. 紀元前 5610年 (±470年)VEI 4地質学的推定
    BCE 5610 ~ 進行中

外部リンク

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