Editing Basin and Range Province (section)

=== Volcanism ===
{{main|List of large volume volcanic eruptions in the Basin and Range Province}}
{{See also|Geologic timeline of Western North America|Yellowstone hotspot}}

Prior to the Eocene Epoch (55.8 ±0.2 to 33.9 ±0.1&nbsp;Ma) the convergence rate of the Farallon and North American plates was fast, the angle of subduction was shallow, and the slab width was huge. During the [[Eocene]] the [[Farallon plate]] [[subduction]]-associated compressive forces of the [[Laramide orogeny|Laramide]], [[Sevier orogeny|Sevier]] and [[Nevada orogeny|Nevada]] orogenies ended, plate interactions changed from orthogonal compression to [[Fault (geology)|oblique strike-slip]], and volcanism in the Basin and Range Province flared up ([[Mid-Tertiary ignimbrite flare-up]]). It is suggested that this plate continued to be underthrust until about 19&nbsp;Ma, at which time it was completely consumed and volcanic activity ceased, in part. [[Olivine basalt]] from the [[oceanic ridge]] erupted around 17&nbsp;Ma and [[extension (geology)|extension]] began.<ref>{{cite journal
 |last= McKee |first= E. H.   |year= 1971 |title= Tertiary Igneous Chronology of the Great Basin of Western United States – Implications for Tectonic Models |journal= Geological Society of America Bulletin |volume= 82 |issue= 12 |pages= 3497–3502 |doi = 10.1130/0016-7606(1971)82[3497:ticotg]2.0.co;2|bibcode = 1971GSAB...82.3497M }}</ref><ref>{{cite web
 |url = http://www.washington.edu/burkemuseum/geo_history_wa/index.htm
 |title = Northwest Origins, An Introduction to the Geologic History of Washington State, Catherine L. Townsend and John T. Figge |publisher = The Burke Museum of Natural History and Culture, University of Washington |access-date = 2010-04-10 }}</ref><ref>
{{cite web |url = http://www.oregongeology.com/sub/publications/ims/ims-028/index.htm |title = Oregon: A Geologic History |publisher = Oregon Department of Geology and Mineral Industries |access-date = 2010-03-26 |archive-url = https://web.archive.org/web/20100128052050/http://www.oregongeology.com/sub/publications/IMS/ims-028/index.htm |archive-date = 2010-01-28 |url-status = usurped }}
</ref><ref>{{cite web |url = http://geology.isu.edu/Digital_Geology_Idaho/Module1/mod1.htm |title = Digital Geology of Idaho, Laura DeGrey and Paul Link |publisher = Idaho State University |access-date = 2010-04-10 |archive-date = 2018-07-21 |archive-url = https://web.archive.org/web/20180721185108/http://geology.isu.edu/Digital_Geology_Idaho/Module1/mod1.htm |url-status = dead }}</ref>