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Joshua Tree >
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Arch Rock
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. < Previous --- Next > |
| Intro:: Nature:: Map:: Parks:: Points of Interest:: Ghosts & Gold:: Communities:: Roads & Trails:: People & History:: BLOG:: Weather:: :?:: glossary |
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These items are historical in scope and are intended for educational purposes only; they are not meant as an aid for travel planning. Copyright ©Walter Feller. 1995-2024 - All rights reserved. |