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Summary

NPS image from http://www.nps.gov/brca/geology_grand.html
(See: en:Aquarius Plateau)

Geology and Cross Section by Peter J. Coney / Revised; 1985. Artwork by Dick Beasley. Published by Zion Natural History Association, in Springdale. Original image is a scan of a separate map (41cm ×62cm, scale 1:435,000).

Depicts the Grand Canyon National Park, Cedar Breaks National Monument, Zion National Park

File modified from its original form.

Modifications

Cropped to remove detailed depictions of Bryce Canyon [and] Cedar Breaks Area, Zion Canyon Area, and Grand Canyon strata. Also cropped to remove quote:

In this region the forces of erosion have laid bare over one billion fie undred million years of the Earth's history. The oldest rocks, those of the Archeozoic, Proterozoic and Paleozoic Eras are found in the walls of the Grand Canyon, where tracks of early amphibians and reptiles, primitive fish, trilobites, brachiopods and many other fossils have been discovered.
The sheer walls, temples and towers of Zion Canyon are carved from rock layers of the Mesozoic Era. Other exposures of rocks of this era are along the Grey, White and Vermilion Cliffs. In these areas, the rocks contain bones and tracks of now-extinct dinosaurs as well as other reptiles, amphibians, ancient mammals and petrified wood.
Younger rocks of the Cenozoic Era form the pinnacles of Cedar Breaks and Bryce Canyons. Presumably these layers as well as those of Mesozoic Age at Zion once extended over the Grand Canyon Region. However, the relentless wearing of the waters has since stripped these layers back to the north to for the celebrated "Great Rock Stairway" of the Vermilion, White, Gray and Pink Cliffs.

Other modifications include:

  • Original title "Geologic Cross Section of the Cedar Breaks–Zion–Grand Canyon Region" blanked out and changed to "The Grand Staircase"
  • In left & right margins, words "North" and "South" blanked out and both changed to "Elevation (feet)"
  • Large red dots added near cliffs labels
  • "Chocolate Cliffs" label added

Image labels

Strata

(given in stratigraphic order)

V
Brian Head [gray]
Wasatch [light red, limestone]
IV
Kaiparowitz [lavender, sandstone]
Straight Cliffs – Wahweap [gray, sandy siltstone]
Coal [black]
Tropic [gray, shale]
Dakota [orange, sandstone]
Carmel [lavender, sedimentary]
Temple Cap [reddish white, crossbedding]
Navajo [blended light red, crossbedding]
Kayenta [lavender silty, sandstone]
Moenave [dark orange, sandstone]
Chinle [yellow, shale]
Shinarump Member [tan, conglomerate]
Moenkopi [dark red, shale]
III
Kaibab [tan, limestone]
Toroweap [dark brown, limestone]
Coconino [light tan, crossbedding]
Hermit [light red, shale]
Supai [light red, siltstone]
Redwall [lavender, limestone]
Temple Butte [purple, limestone]
Muav [tan, limestone]
Bright Angel [tan orange, shale]
Tapeats [light brown, sandstone]
II
Dox [red orange, sandstone]
Shinumo [orange tan, sandstone]
Hakatai [deep red, shale]
Diabase [light gray, intrusive igneous]
Bass [white, limestone]
I
[Vishnu Group depicted (tan, foliated metamorphic)]
[Zoroaster Granite depicted (white, granitic)]

Geography

(left to right)

Cedar City 5800'
I-15
Coal Mines
Hurricane Cliffs
Cedar Breaks 10,350'
Brian Head 11,307'
Lava Flow
Markagunt Plateau
Panguitch Lake
← Navajo Lake
Lava
← Red Canyon
Long Valley Jct.
Paunsaugunt Plateau
Pink Cliffs
Bryce Canyon 8500'
← Tropic
Aquarius Plateau
Grey Cliffs
Sevier Fault ↓
Sunset Cliffs
Table Cliffs
West Temple 7795' →
Kolob Terrace
Zion Canyon 4000'
Mt. Carmel Junction
White Cliffs
Sevier Fault ↓
Coral Pink Sand Dunes
Pipe Spring 5000'
Kanab
Vermilion Cliffs
Antelope Valley
Fredonia
U.S. 89
U.S. 89 A
Kaiparowits Plateau
Paria River
Chocolate Cliffs
Colorado River
Rainbow Bridge ↓
↓ Lake Powell
Navajo Mountain 10,388'
Glen Canyon Dam
Page
Echo Cliffs
Jacob Lake
Black Mesa
Kaibab Plateau
Painted Desert
North Rim 8000'
Grand Canyon
Cape Royal
South Rim 7000'

Faults

(left to right)

Hurricane Fault
Sevier Fault

Licensing

Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.

Captions

"Geologic map and cross-section in color with text. Shows strata for Bryce Canyon and Cedar Breaks Area, Zion Canyon Area, and Grand Canyon."

image/jpeg

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current05:20, 8 September 2005Thumbnail for version as of 05:20, 8 September 20051,700 × 483 (204 KB)Huebi~commonswikiNPS image from [http://www.nps.gov/brca/geology_grand.html] {{PD-USGov-NPS}} category:US National Parks

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