Apr 14, 2019
evosia
From day to sunset to night in Monument Valley
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evosia
From day to sunset to night in Monument Valley
evosia Sunset at Gunsight Butte, Alstrom Point
Canyon de Chelly, by Ansel Adams
This photograph from the public domain was taken by the photographer Ansel Adams, who photographed many of the monuments and parks throughout the western United States.
This image shows a national monument in Arizona known as Canyon de Chelly. It is located in Northeast Arizona, in the “four-corners” region. The canyon is in the ancestral territory of the Navajo people and to this day hosts some of their homes and lands. It is managed in cooperation between the National Park Service and the Navajo nation.
The rocks making up the canyon and this photo are the Triassic-aged de Chelly sandstone. It was deposited in an arid desert setting between 230 and 250 million years ago. The rocks show thick layering and large-scale cross bedding characteristic of sand dune migration.
The de Chelly sandstone is younger than the rocks that make up the top of the Grand Canyon but likely outcrops (or is a similar unit) to one of the sandstones that outcrops in the Canyonlands and Grand Staircase areas north of the Grand Canyon. Depending on who does the classification, it probably fits in as part of the Moenkopi formation.
-JBB
Image credit: US National Archives (unrestricted use): http://research.archives.gov/description/519852
Geology of the Triassic of Utah and Northern Arizona: http://www.nps.gov/history/history/online_books/geology/publications/pp/132-A/sec2c.htm
Canyon de Chelly, NPS: http://www.nps.gov/cach/index.htm
Stratigraphy from USGS: http://3dparks.wr.usgs.gov/coloradoplateau/canyondechelly_strat.htm
Incredible views of Canyonlands
A quick hike in Monument Valley, Arizona
Fly through Monument Valley
Three sisters
These piles of sedimentary rock are a tiny sample of the giant pillars in Monument Valley, located in the Navajo Tribal Park in Arizona. The resistant De Chelly Sandstone, deposited during the Permian era – the time of the assembly of Pangaea, holds up the steep slopes.
-JBB
Image credit: Jean-Marc Linder https://flic.kr/p/oYm9YF
Reference: http://monumentvalley.org/geology/