In Arizona, United States
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This Earthcache is located at stop 13 on the Ajo Mountain Drive at Organ Pipe Cactus National Monument. The Drive is a 21 mi. dirt road which can be driven in a passenger car, vehicles over 25' are not permitted. This cache can be accessed by wheel chair.
The arch at Arch Canyon is one of the most loved and photographed attractions of the Organ Pipe Cactus National Monument. While winding your way along this dirt road you will become immersed in the desert landscape. On your way to the cache you will have a chance to look out over spectacular scenic views, as you make your way through the creosote flats and up into the foot hills of the Ajo Mountains.
You must pay an entrance fee of $8 to access the Monument by car. Federal Recreation Passports are accepted.
All information to complete this Earthcache challenge is provided on the wayside signs which are located near the arch at the posted coordinates.
1. Earth on the Move: Periodic (a)_____ ______ and deposits of (b)_____ ______ followed by (c) ______ and (d) _______, gave shape to today’s Organ Pipe Cactus National Monument.
2. Blasts from the Past: Slow moving rhyolite flows often scrape up fragments of other rocks, cementing them together to form a new rock called ________.
3. Similar events to what famous mountain created the rocks of this canyon?
4. Explain in your own words 2 natural factors/processes that result in the creation of this arch.
Please email all four answers to ORPI Cacher for credit. You may go ahead and log your find without an acknowledgement from us, but logs posted without correct answers will be deleted.
This Earthcache has was approved by:
Chief of Interpretation Andy Fisher
Organ Pipe Cactus National Monument
For more information on Organ Pipe Cactus National Monument go to:
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Last Updated: on 3/5/2014 7:42:16 PM (UTC-08:00) Pacific Time (US & Canada) (3:42 AM GMT)
Coordinates are in the WGS84 datum