Difference between revisions of "Concretion"
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| − | '''Concretion''', commonly discrete, rounded [[nodular]] [[rock]] masses formed and found in [[bedding|beds]] of [[shale]] or [[clay]]. | + | '''Concretion''', commonly discrete, rounded [[nodular]] [[rock]] masses formed and found in [[bedding|beds]] of [[shale]] or [[clay]].<reF>Pellant, p. 250</ref> |
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| − | Pellant, p. 250 | ||
=Sources= | =Sources= | ||