Hayrick Butte
| Hayrick Butte | |
|---|---|
As seen from top of Hoodoo Ski Area
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| Highest point | |
| Elevation | 5,523 ft (1,683 m) NAVD 88 |
| Prominence | 563 ft (172 m) |
| Coordinates | 44°23′57″N 121°52′17″W / 44.3992857°N 121.8714477°WCoordinates: 44°23′57″N 121°52′17″W / 44.3992857°N 121.8714477°W |
| Geography | |
 Hayrick Butte
Location in Oregon
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| Location | Linn County, Oregon, U.S. |
| Parent range | Cascades |
| Topo map | USGS Three Fingered Jack |
| Geology | |
| Age of rock | 80±20 thousand years |
| Mountain type | Tuya |
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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Wikipedia