From Ocean to Alcove

From Ocean to Alcove (HM15OO)

Location: Flagstaff, AZ 86004 Coconino County
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Country: United States of America
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N 35° 10.125', W 111° 30.661'

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Limestone forms the massive overhang above you and the ledge you are standing on. In between, softer layers of silty limestone have retreated, eroded away. All of the cliff dwelling rooms in Walnut Canyon — more than 300 — were built in natural alcoves like this.

If you have visited Grand Canyon, you have met these rocks before. This is the Kaibab Formation, the rim rock of both canyons. Below, as in Grand Canyon, are the Toroweap Formation and Coconino Sandstone.

[Diagram and photo captions read]
Notice the pattern of diagonal lines or cross-bedding in the sandstone visible directly across the canyon (and shown here). The preserved sand layers record changing wind direction.
Formed by deposits of calcium carbonate in a shallow sea near an ancient shoreline about 250 million years ago.
Formed in a near-shore environment of stream-deposited sediments and windblown sand dunes, about 265 million years ago. Windblown layers of sand were deposited on the downwind slope, at an angle.
Paleogeographic map of North America with detail of Arizona. Northern Arizona had beach front property during the Permian age, roughly 286 to 248 million years ago.
HM NumberHM15OO
Placed ByNational Park Service
Marker ConditionNo reports yet
Date Added Sunday, September 7th, 2014 at 8:33am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)12S E 453464 N 3891876
Decimal Degrees35.16875000, -111.51101667
Degrees and Decimal MinutesN 35° 10.125', W 111° 30.661'
Degrees, Minutes and Seconds35° 10' 7.50" N, 111° 30' 39.66" W
Driving DirectionsGoogle Maps
Area Code(s)928, 602, 520
Closest Postal AddressAt or near 400-402 Walnut Canyon Rd, Flagstaff AZ 86004, US
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