Depositional structures as preserved in the Jurassic Navajo sandstones of Southwest Utah, USA. Structures like these may be formed during or shortly after deposition of the original sand carried by water or wind. Later they are preserved in the sandstone formed from these sands.

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Photo credit: © DIRK WIERSMA/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: -, aeolian, america, american, carried, deposit, deposits, earth, fossilised, fossilized, geological, geology, jurassic, north, pattern, patterns, sand, sandstone, sciences, sediment, sedimentary, sedimentology, states, structure, structures, united, usa, utah, water, windblown