The Navajo Sandstone is known for its beautiful red and tan crossbedded sandstones that grace many of the national parks and monuments in the southwest USA. The sands were deposited in dunes within the largest known sand sea (erg) in Earth’s history during the Early Jurassic. These deposits show a record of desertification — the process by which fertile lands become desert. How did this landscape lose its water bodies, vegetation, and animals?
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Source: ScienceDaily