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| year = 2008
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| url = http://www.publiclands.org/explore/site.php?search=YES&back=Search%20Results&id=7121
| accessdate = 2008-08-13}}</ref>
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'''Upper Mesa Falls''' is a [[waterfall]] on the [[Henrys Fork (Snake River)|Henrys Fork]] in the [[Caribou-Targhee National Forest]]. Upstream from [[Lower Mesa Falls]], it is roughly 16 miles away from [[Ashton, Idaho]].
'''Upper Mesa Falls''' is a [[waterfall]] on the [[Henrys Fork (Snake River)|Henrys Fork]] in the [[Caribou-Targhee National Forest]]. Upstream from [[Lower Mesa Falls]], it is roughly {{convert|16|mi|km}} away from [[Ashton, Idaho]].<ref>{{cite gnis|392638|Upper Mesa Falls|January 15, 2015}}</ref>


Upper Mesa Falls is roughly 114 feet high and 200 feet wide.<ref>[http://www.westyellowstonenet.com/attractions/mesa_falls.php Mesa Falls Near Ashton Idaho<!-- Bot generated title -->]</ref>
Upper Mesa Falls is roughly {{convert|114|ft|m}} high and {{convert|200|ft|m}} wide.<ref>{{cite web |url=http://www.westyellowstonenet.com/attractions/mesa_falls.php |title=Mesa Falls Near Ashton Idaho}}</ref>


==Formation==
==Formation==
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| last = Shallat
| last = Shallat
| first = Todd A
| first = Todd A
⚫
|author2=Bentley, E B
| authorlink =
⚫
| title = Snake: the plain and its people
⚫
| coauthors = Bentley, E B
⚫
| title = Snake: the plain and its people
| publisher = [[Boise State University]]
| publisher = [[Boise State University]]
| year = 1994
| year = 1994
| location = [[Boise, Idaho|Boise, ID]]
| location = [[Boise, Idaho|Boise, ID]]
| pages = 53
| pages = 53
| url =
| doi =
| oclc = 31689273
| oclc = 31689273
| isbn = 9780932129123}}
| isbn = 978-0-932129-12-3}}
</ref> This layer compressed and hardened over time.
</ref> This layer compressed and hardened over time.


Between 200,000 and 600,000 years ago, the river eroded a wide canyon which was subsequently partly filled with [[basalt]] lava flows. The Henrys Fork of the Snake River then carved the channel through the basalt; which is the inner canyon seen today.
Between 200,000 and 600,000 years ago, the river eroded a wide canyon which was subsequently partly filled with [[basalt]] lava flows. The Henrys Fork of the Snake River then carved the channel through the basalt; which is the inner canyon seen today.


==External links==
==See also==
[[File:Mesa-falls.webm|thumb|thumbtime=1|Video of the Upper Mesa Falls]]
⚫
* [http://www.fs.fed.us/r4/caribou-targhee/about/mesafalls/index.shtml Mesa Falls Recreation Area] (USDA Forest Service - Caribou-Targhee National Forest)
* [[List of waterfalls in Idaho]]


==References==
==References==
{{reflist}}
{{reflist}}

==External links==
{{commons category|Upper Mesa Falls}}
⚫
* [http://www.fs.usda.gov/recarea/ctnf/recreation/outdoorlearning/recarea/?recid=80612&actid=120 Mesa Falls Visitor Center] (USDA Forest Service - Caribou-Targhee National Forest)

{{Idaho}}
{{Authority control}}


[[Category:Landforms of Fremont County, Idaho]]
[[Category:Landforms of Fremont County, Idaho]]
[[Category:Waterfalls of Idaho]]
[[Category:Waterfalls of Idaho]]
[[Category:Visitor attractions in Fremont County, Idaho]]
[[Category:Tourist attractions in Fremont County, Idaho]]
[[Category:Block waterfalls]]
[[Category:Articles containing video clips]]



{{Idaho-stub}}
[[fa:آبشار آپر مزا]]

Latest revision as of 00:38, 10 December 2023

Upper Mesa Falls
Upper Mesa Falls in June, 2008
Map
LocationFremont County, Idaho
Coordinates44°11′16″N 111°19′48″W / 44.18778°N 111.33000°W / 44.18778; -111.33000
TypeBlock
Elevation5,600 feet (1,707 m)
Total height114 feet (35 m)[1]
WatercourseHenrys Fork (Snake River)

Upper Mesa Falls is a waterfall on the Henrys Fork in the Caribou-Targhee National Forest. Upstream from Lower Mesa Falls, it is roughly 16 miles (26 km) away from Ashton, Idaho.[2]

Upper Mesa Falls is roughly 114 feet (35 m) high and 200 feet (61 m) wide.[3]

Formation

[edit]

Mesa Falls Tuff, which is the rock over which Upper Mesa Falls cascades, was formed 1.3 million years ago. A cycle of rhyolitic volcanism from the Henrys Fork caldera deposited a thick layer of rock and ash across the area.[4] This layer compressed and hardened over time.

Between 200,000 and 600,000 years ago, the river eroded a wide canyon which was subsequently partly filled with basalt lava flows. The Henrys Fork of the Snake River then carved the channel through the basalt; which is the inner canyon seen today.

See also

[edit]
Video of the Upper Mesa Falls

References

[edit]
  1. ^ "Upper Mesa Falls, Idaho". Public Lands Information Center. 2008. Retrieved 2008-08-13.
  2. ^ "Upper Mesa Falls". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved January 15, 2015.
  3. ^ "Mesa Falls Near Ashton Idaho".
  4. ^ Shallat, Todd A; Bentley, E B (1994). Snake: the plain and its people. Boise, ID: Boise State University. p. 53. ISBN 978-0-932129-12-3. OCLC 31689273.
[edit]
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