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Hayrick Butte
Tuya
in
Willamette NF
,
Cascade Range
near
Camp Sherman
,
OR
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On Wikipedia
Hayrick Butte is a tuya, a type of volcano, in the Cascade Range of northern Oregon, located in the Willamette National Forest near Santiam Pass and just west of the Cascade Crest. It is adjacent to the cinder cone, Hoodoo Butte, which overlaps its western edge. A tuya is a type of subglacial volcano, formed when lava erupts underneath an overlying glacier or ice sheet and then melts through to the surface and pools, producing the flat plateau on top with near-vertical walls along the ice-contact margin as the lava cools and hardens. Hayrick Butte is one of the most perfectly formed examples of a tuya in the contiguous United States with a nearly flat triangular plateau about 0.5 miles (0.8 km) across and steep walls rising about 700 feet (210 m) above the plain below.
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Taxonomy
Classified As
Tuya
Geologic Formation
Mafic vent complexes (ORQTmv;0)
Geologic Formation
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