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Petrified Forest NP

Petrified Forest NP. GLY 3164, Spring 2006. Park Map. Park is basically two units Painted Desert is to the North Petrified Forest is in the south. Multi-Colored Ash Layers. In the Painted Desert Region. Petrified Logs. Volcanic ash is visible in background Along Straight Logs Trail.

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Petrified Forest NP

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  1. Petrified Forest NP GLY 3164, Spring 2006

  2. Park Map • Park is basically two units • Painted Desert is to the North • Petrified Forest is in the south

  3. Multi-Colored Ash Layers • In the Painted Desert Region

  4. Petrified Logs • Volcanic ash is visible in background • Along Straight Logs Trail

  5. Painted Desert Overlook • Spectacular view of the extremely colorful Chinle formation, exposed in the Painted Desert

  6. Painted Desert • Note spacing of vegetation, indicating very arid conditions

  7. Painted Desert View

  8. Colorful Logs • Small amounts of impurities in silica create very colorful displays

  9. Petrified Log Video • Close-up of the log, showing excellent preservation of the log structure • Double-click to play video

  10. Log in the Blue Mesa Region • Blue Mesa is composed of bentonite clay, a weathering product of volcanic ash • Clay is very easily eroded

  11. Blue Mesa Overview • Differential Erosion

  12. Log on Pedestal • In the Blue Mesa Region

  13. Lithodendron Wash • Small objects in the basin are petrified logs

  14. Petrified Logs • Differential erosion uncovers the locks, because they are much more resistant to weathering than the soft Chinle formation in which they are found

  15. Petrified Log in Painted Desert • Log has helped to preserve the easily eroded ash underneath it

  16. Agate Bridge • Agate bridge has now been supported by the NPS to protect it, but originally spanned a small dry wash

  17. Giant Logs • Along the Giant Logs trail

  18. Broken Log • Many large logs break at regular intervals

  19. Petrified Forest Logs • Montage of video clips

  20. Newspaper Rock • In the Painted Desert section • Rock writing was sometimes used to leave messages

  21. Pictoglyphs • Rock is dark colored because of desert varnish • Scraping rock reveals the true rock color, and makes writing or drawing possible • Many such writings were left by prehistoric Native Americans

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