Glen Canyon Group
The Glen Canyon Group is a geologic group of formations that is spread across the U.S. states of Nevada, Utah, northern Arizona, north west New Mexico and western Colorado. It is called the Glen Canyon Sandstone in the Green River Basin of Colorado and Utah.
| Glen Canyon Group | |
|---|---|
| Stratigraphic range: | |
Glen Canyon Group in southeast Utah. At top are massive beds of Navajo Sandstone separated by thinner beds of the Kayenta Formation from massive beds at bottom of the Wingate Sandstone. | |
| Type | Group |
| Sub-units | (oldest to youngest) Wingate Sandstone, Moenave Formation, Kayenta Formation, Navajo Sandstone |
| Underlies | San Rafael Group |
| Overlies | Chinle Formation |
| Location | |
| Coordinates | 36.938°N 111.483°W |
| Region | Four Corners |
| Country | United States |
| Type section | |
| Named for | Glen Canyon |
| Named by | Gregory and Moore |
Glen Canyon Group (the United States) Glen Canyon Group (Arizona) | |
There are four formations within the group. From oldest to youngest, these are the Wingate Sandstone, Moenave Formation, Kayenta Formation, and Navajo Sandstone. Part of the Colorado Plateau and the Basin and Range, this group of formations was laid down during the Late Triassic and Early Jurassic, with the Triassic-Jurassic boundary within the Wingate Sandstone. The top of the Glen Canyon Group is thought to date to the Toarcian stage of the Early Jurassic.
Asterisks (*) below indicate usage by the U.S. Geological Survey.