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221 bytes added ,  04:02, May 26, 2007
new entry
Pea-sized [[sediment]] grain with [[concentric]] internal structure.

Pellant, p. 251

=Sources=
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)

[[category:geology]]
nsTeam1RO, nsTeam1RW, nsTeam1_talkRO, nsTeam1_talkRW
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