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'''Concretion''', commonly discrete, rounded [[nodular]] [[rock]] masses formed and found in [[bedding|beds]] of [[shale]] or [[clay]].<reF>Pellant, p. 250</ref>
'''Concretion''', commonly discrete, rounded [[node|nodular]] [[rock]] masses formed and found in [[bedding|beds]] of [[shale]] or [[clay]].<reF>Pellant, p. 250</ref>
=Sources=
=Sources=
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)
<references/>
[[category:geology]]
[[category:geology]]
[[Category:Dictionary]]
[[Category:Dictionary]]