Marker Logo HMdb.org THE HISTORICAL
MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”

Colorado National Monument in Mesa County, Colorado — The American Mountains (Southwest)
 

Ancient Environments

 
 
Ancient Environments Marker image. Click for full size.
By William Fischer, Jr., October 12, 2020
1. Ancient Environments Marker
Inscription.  

The rocks that make up this landscape formed in environments that are very similar to ones we can observe on the earth's surface today as well as ones that occur beneath the surface where tectonic plates collide to form mountain ranges.

Kayenta Formation
The Kayenta Formation is a sandstone that is more resistant to erosion than many of the other sedimentary rocks in the park. The Kayenta Formation was deposited by a high-energy braided river system similar to the Rio Grande River in New Mexico.

Wingate Formation
The Wingate Formation is a tan sandstone whose sweeping tilted layers tell us that this rock was deposited in a desert environment where wind-swept sands accumulated and were buried. An environment like this can be found in the modern Sahara Desert of North Africa.

Chinle Formation
The Chinle Formation is primarily a reddish-brown mudstone that likely was deposited in densely-vegetated floodplains or mudflats with small ponds and streams. This environment is similar to the coastal environments in South America and Africa.

Precambrian Metamorphic Rocks
Dark schists and

Ancient Environments Marker image. Click for full size.
By William Fischer, Jr., October 12, 2020
2. Ancient Environments Marker
light pegmatites are the extremely erosion-resistant basement rocks found in the bottom of the Monument's canyons. These rocks began as sediments that were later deformed in mountain building processes. They were deposited, buried, heated, squeezed, uplifted and planed off by erosion - all before the sedimentary rocks of the Monument were deposited. Today, rocks like these are being formed and then deformed where tectonic plates converge. An example is along the western margin of South America.
 
Erected by National Park Service.
 
Topics. This historical marker is listed in this topic list: Natural Features.
 
Location. 39° 5.428′ N, 108° 43.366′ W. Marker is in Colorado National Monument, Colorado, in Mesa County. Marker is at The Grand View scenic overlook, off Rim Rock Drive. Touch for map. Marker is in this post office area: Fruita CO 81521, United States of America. Touch for directions.
 
Other nearby markers. At least 8 other markers are within 5 miles of this marker, measured as the crow flies. The Grand View (about 400 feet away, measured in a direct line); Tragedies on Rim Rock Drive (about 400 feet away); The Shape of Independence (approx. half a mile away); Climbing Independence (approx. half a mile away); The Shapes of Erosion (approx. 0.8 miles away); John Otto (approx. one mile away); Stephen Tyng Mather
Ancient Environments image. Click for full size.
By William Fischer, Jr., October 12, 2020
3. Ancient Environments
(approx. one mile away); Western Slope Vietnam War Memorial Park (approx. 4.4 miles away). Touch for a list and map of all markers in Colorado National Monument.
 
Also see . . .
1. Colorado National Monument. (Submitted on November 10, 2020, by William Fischer, Jr. of Scranton, Pennsylvania.)
2. The Geologic Story of Colorado National Monument (USGS).
Large file that is slow to load
(Submitted on November 10, 2020, by William Fischer, Jr. of Scranton, Pennsylvania.) 

3. Geologic Map of Colorado National Monument and Adjacent Areas, Mesa County, Colorado. (Submitted on November 10, 2020, by William Fischer, Jr. of Scranton, Pennsylvania.)
 
Ancient Environments image. Click for full size.
By William Fischer, Jr., October 12, 2020
4. Ancient Environments
 
 
Credits. This page was last revised on November 10, 2020. It was originally submitted on November 10, 2020, by William Fischer, Jr. of Scranton, Pennsylvania. This page has been viewed 48 times since then and 4 times this year. Photos:   1, 2, 3, 4. submitted on November 10, 2020, by William Fischer, Jr. of Scranton, Pennsylvania.
Paid Advertisement
Mar. 2, 2021