Hayrick Butte

Infobox Mountain
Name = Hayrick Butte
Photo =
Caption =
Elevation = convert|5523|ft|m|lk=on [ cite web
url = http://nwdata.geol.pdx.edu/OR-GIS/PlaceNames/H.html
title = Northwest GeoData Clearinghouse
publisher = Department of Geology: Portland State University
accessdate = 2008-04-01 ]
Location = Linn County, Oregon, USA
Range = Cascades
Prominence =
Coordinates = coord|44.3992857|-121.8714477|format=dms|region:US_type:mountain [GNIS|1143408accessdate|2008-03-31]
Topographic
USGS Three Fingered Jack
Type= Tuya
Age =
Last eruption =
First ascent =
Easiest route =

Hayrick Butte is a tuya volcano in the Cascade Range of northern Oregon, located near Santiam Pass 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 convert|0.5|mi|km|1 across and steep walls rising about convert|700|ft|m above the plain below.

References

* cite book
last = Harris
first = Stephen L.
title = Fire Mountains of the West: The Cascade and Mono Lake Volcanoes (3rd ed.)
publisher = Mountain Press Publishing Company
date = 2005
isbn = 0-87842-511-X
* cite book
last = Wood
first = Charles A.
coauthors= Jürgen Kienle, eds.
title = Volcanoes of North America
publisher = Cambridge University Press
date = 1990
isbn = 0-521-43811-X