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Lake Powel-giant weathering pits

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Trail stats

Distance
0.5 mi
Elevation gain
253 ft
Technical difficulty
Moderate
Elevation loss
0 ft
Max elevation
3,870 ft
TrailRank 
23
Min elevation
3,613 ft
Trail type
One Way
Coordinates
71
Uploaded
October 17, 2008
Recorded
October 2008
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near Wahweap, Arizona (United States)

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Trail photos

Photo ofLake Powel-giant weathering pits Photo ofLake Powel-giant weathering pits Photo ofLake Powel-giant weathering pits

Itinerary description

Very large, deep, straight-sided pits in Entrada sandstone. These are larger, deeper with straighter sides than potholes formed by water erosion along desert water courses. There is no evidence of water exit, except by evaporation or absorption by the sandstone below. A search on the internet will show you a collection of books and geological papers explaining this phenomena.

Current access to the beginning of this hiking route is by boat.

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Waypoints

PictographMooring point Altitude 3,600 ft

trail head

No place to anchor your boat here. Either leave someone with the boat or park at a nearby beach and kayak to this spot.

Comments  (2)

  • sitton85 May 18, 2009

    These are called Gnamma pits.

  • Photo of ClipperCreekWanderer
    ClipperCreekWanderer May 18, 2009

    Thanks for the update.

    Here are some geologic references. These pits are in the vicinity of Cookie Jar bluff as mentioned in this article:
    http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=5022386

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