Английская Википедия:Ingakslugwat Hills

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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 Шаблон:Nowrap[1] The field contains unusual so-called "Ingakslugwat volcanoes", volcanic ridges up to Шаблон:Convert long and Шаблон:Convert 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.[2]

The field is located Шаблон:Convert north of Baird Inlet. The volcanoes rise Шаблон:Convert over the surrounding plains and often contain small crater lakes.Шаблон:Sfn The height of the cones ranges Шаблон:Convert.[1] The volcanoes were active between 1 million and 700,000 years ago,[3] but the latest activity may be of Holocene age.[1] The volcanoes are formed by basaltic rocks. Other Quaternary volcanic centres in the region are Nelson Island and the Kusilvak Mountains.Шаблон:Sfn

Olivine basalt is the principal volcanic rock but basanite and nephelinite are also found.[1]

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Шаблон:BethelAK-geo-stub Шаблон:KusilvakAK-geo-stub