![Figure-31](https://arizonadailyindependent.com/wp-content/uploads/2016/07/Figure-31.png)
If you plan to go to Petrified Forest National Park, enhance your experience by taking along a guide to geologic features. The Arizona Geological Survey just released a 48-page illustrated guide which you can download for free:
http://repository.azgs.az.gov/sites/default/files/dlio/files/nid1683/dte-10_400dpi.pdf
![Figure 32 Segmented petrified tree trunk, Long Logs Trail.](https://arizonadailyindependent.com/wp-content/uploads/2016/07/Figure32-520x270.png)
See also, my article: Geology of Petrified Forest National Park