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Slab of Navajo Sandstone threatens to fall on Glen Canyon dam facilities
Source info:
| Author: | Lee Allison |
|---|---|
| Date: | 2015-09-05 16:27:00 |
| Blog: | Arizona Geology  |
| URL: | http://arizonageology.blogspot.com/2015/09/slab-of-navajo-sandstone-threatens-to.html |
Summary:
A 250-ton slab of Navajo Sandstone is threatening to peel off the rock wall above Lake Powell overlooking power plant facilities below Glen Canyon Dam. Photos from local professional photographer Frank Talbott (http://www.franktalbott.net/) show work by Bureau of Reclamation crews rappelling off the cliff face in an attempt to install rock bolts and prevent the slab from falling. [Content analysis:
Stratigraphic context:
| Recognized stratigraphic terms [n]: | Navajo Sandstone [1] |
|---|---|
| Agenames chronostratigraphy [rating]: | [0.1] Jurassic [0.75] Triassic [0.1] Mesozoic [0.8] Neoarchean [0.1] Phanerozoic [0.8] Archean [0.1] Lower Jurassic [0.67] Toarcian [0.1] Pliensbachian [0.1] Precambrian [0.1] |
Geographic context:
| Location | Country | Latitude | Longitude |
|---|---|---|---|
| Glen Canyon Dam | US | 36.9348 | -111.486 |
| Lake Powell | US | 37.5453 | -110.377 |
| Navajo | US | 35.2855 | -110.289 |
| Sandstone | US | 46.1298 | -92.8644 |
| Talbott | US | 36.1528 | -83.4153 |
Keywords:
250-ton slab, attempt, Bureau, cliff, Dam. Photos, Glen Canyon dam, http://www.franktalbott.net/, Lake, Navajo Sandstone, photographer Frank Talbott, plant facilities, Powell overlooking power, Reclamation crews, rock bolts, rock wall, work
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