Classroom » Multimedia
Bad lands in Petrified Forest National Park, AZ
About this photograph
- Creator
- Margery H. Freeman
- Date created
- Unknown
- Location
- Petrified Forest National Park, Arizona
- License
- This photograph copyright ©2009. All Rights Reserved
Related media
Learn more
- Search LEARN NC for Arizona, AZ, butte, fossils, mesa, national parks, Painted Desert, Petrified Forest, Petrified Forest National Park, petrified tree, petrified wood, Rainbow Forest, sandstone, trees, and wood.
In the classroom
- See our collection of articles on visual literacy for ideas on using photographs meaningfully in the classroom.
The sculpted ridges of bad lands in Petrified Forest National Park, Arizona. The formations show that thousands of years of mineral deposition have created colorful stripes in the surface of the rock. Deposition, uplift, and erosion have created a diverse landscape over millions of years. Many formations, such as mesas and buttes, are formed when a protective cap of sandstone prevents erosion of softer clays below the cap.
Petrified Forest National Park encompasses part of the Rainbow Forest and the Painted Desert. It consist of several “forests” of petrified wood. Around 200 million years ago, logs washed into a river and were buried quickly and deeply by sediment, which sealed them from oxygen and slowed their decay. Minerals replaced the log’s organic material and crystallized, forming amethyst, citrine, and smoky and clear quartz. The resulting logs are rainbow hues and glitter in the sun. Petrified Forest National Park is also home to many plant and animal fossils and is the site of much ongoing research.
