No higher resolution available.
Grand_Canyon_Supergroup_showing_Cardenas_Lava.JPG (800 × 524 pixels, file size: 114 KB, MIME type: image/jpeg)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: (See file name). (Photo: "Unkar Creek Delta, on Colorado River, near the start of the basement rocks in Grand Canyon." (the start is just upstream) The horizontal cliff at top of the 15 degree, angular unconformity, is the en:Tapeats Sandstone. 4 Horizontally laid (deposited) layers are shown in this photo below the en:Tapeats Sandstone. The top layer is at photo top-right. The first 2 layers are in Grand Canyon Supergroup-(of 4 units). (#3 of 4)-Chuar Group, (#2 of 4)-Nankoweap Formation, (3 and 4, are layers No. 5/6 of the en:Unkar Group)-(unit #1 of 4 in the Supergroup(Unkar Group), (unit 6 of 6)-en:Cardenas Lava, (unit 5 of 6)-Dox Formation. The 4-layers are conformablly laid, no timegaps. The contact above the Sixty Mile Formation (unit 4 of 4)/Chuar Group is a en:fault (geology) with Vishnu Schist, mostly found later downstream, (another fault), in the Granite Gorge-(but with the bottom units of the series, (the lowest of Unkar Group, unit 1 of 6)). Note: Basalt Creek delta, is in the Dox Formation, the cliffs directly up creekside, go into the overlying Cardenas Lava, maybe 40-80 ft(?) thick, at creekside, but the Cardenas Lava in places is up to 800 ft thick. |
| Source | http://www.nature.nps.gov/geology/parks/grca/age/index.cfm |
| Author | National Park Service |
| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
|---|
Licensing
|
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. |  |
| Annotations | This image is annotated: View the annotations at Commons |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:12, 6 September 2009 | | 800 × 524 (114 KB) | Mav | == Summary == {{Information |Description=See file name |Source=http://www.nature.nps.gov/geology/parks/grca/age/index.cfm |Date= |Author=National Park Service |Permission= |other_versions= }} == Licensing == {{PD-USGov}} [[categ |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Global file usage
The following other wikis use this file:
- Usage on de.wikipedia.org
- Usage on he.wikipedia.org
