Changes

'''Concretion''', commonly discrete, rounded [[node|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===

==References==

<references/>

<references/>

[[category:geology]]

[[Category:Geology]]

[[Category:Dictionary]]

[[Category:Dictionary]]