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Disappearing Soil

In this photo you can see a rusty brown coating on the rocks which is known to geologists as desert varnish. Follow the varnish down toward the sandy soil and you will see a distinct line where the varnish ends and a fresher surface of the rock is exposed. This linear feature graphically illustrates that the soil levels were once this high.


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Arch Rock Geology Tour
The Formation of Granite
Mineralogy
The Contact Zone
Water At Work
The Arch
Disappearing Soil
Dikes
Sculpted Rocks
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features - ecology: wildlife - plants - places - region map - map/sat - roads & trails - wilderness - video - aerial - 360 - old west - communities - books - lodging
route 66 - ghost towns - gold mines - parks & ... - joshua tree - death valley - mojave preserve - native culture - history - natural features - geology - glossary - comments
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