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
Last modified January 6, 2004 by Lisa Gardiner.
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