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Arches National Park Geology Tour provides an extensive, visually rich description of the geology of Arches, by Deborah Ragland, Ph.D. See our DVD collection.


Sand collects in shallow parts of the ocean like the place shown in (A). It is carried to the sea by rivers that move sediment from eroding mountains. The larger grains of sediment are deposited closer to shore and the smaller grains are deposited further from shore. The sand often forms ripples, like you can see in (A), and even underwater sand dunes and may eventually become layers of sedimentary rock called sandstone like that shown in (B).

How do people get to the shallow ocean? They scuba dive!

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Both images courtesy of Martin Miller, University of Oregon and the Earth Science World Imagebank.
Last modified January 6, 2004 by Lisa Gardiner.

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TES XXVI, 3 fall 2010 The Fall 2010 issue of The Earth Scientist, focuses on rocks and minerals, including articles on minerals and mining, the use of minerals in society, and rare earth minerals, and includes 3 posters!

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