At the bottom of lakes such as (A) Waterton Lake in Canada fine-grained sediment collects. This sediment may someday become solid rock like that shown in (B) with tiny horizontal layers called laminations.
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(A) Marcus Milling, American Geological Institute, and (B) Martin Miller, University of Oregon. Both images courtesy of Earth Science World Imagebank
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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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