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Ingakslugwat Hills

Medan gunung api · United States · 190 m

The Ingakslugwat Hills volcanic field covers an area of more than 500 km2 and contains over 32 scoria cones and 8 larger craters, some of which are seen in this Planet Labs June 2019 satellite image monthly mosaic (N is at the top; image is approximately 40 km across).
The Ingakslugwat Hills volcanic field covers an area of more than 500 km2 and contains over 32 scoria cones and 8 larger craters, some of which are seen in this Planet Labs June 2019 satellite image monthly mosaic (N is at the top; image is approximately 40 km across). · Foto: Satellite image courtesy of Planet Labs Inc., 2019 (https://www.planet.com/). · Wikimedia Commons
Tipe
Medan gunung api
Negara
United States
Wilayah
North America Volcanic Regions / Northern Alaska-Bering Sea Volcanic Province
Ketinggian
190 m
Koordinat
61.430, -164.470
Letusan terakhir
Tidak diketahui
Kondisi tektonik
Intraplate / Continental crust (> 25 km)
Bentuk lahan
Cluster
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

The Ingakslugwat Hills consist of at least 32 small cinder cones and eight larger craters covering more than 500 km2 in the Yukon-Kuskokwin delta area of SW Alaska. Numerous small spatter cones and cinder cones range from 8 to 190 m in height; many are concentrated in the NW side of the volcanic field. The latest activity was considered to have occurred during the Holocene (Moll-Stalcup, in Wood and Kienle, 1990). One low cone containing a 400-m-wide lake may be a maar. This dominantly alkali olivine basaltic field also contains basanitic and nephelinitic rocks, some with inclusions of lherzolite and layered gabbro.

Ringkasan Wikipedia

Ringkasan Inggris

The Ingakslugwat Hills volcanic field is in the Yukon–Kuskokwim Delta in western Alaska. It contains eight large craters and about thirty small pyroclastic cones in an area of some 500 km2. The field contains unusual so-called "Ingakslugwat volcanoes", volcanic ridges up to 7 kilometres (4.3 mi) long and 400 metres (1,300 ft) high which are formed by pyroclastic material. They most likely formed by the interaction of permafrost with magma, seeing as they have a hydrovolcanic nature despite being high above the water table.

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