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Geography 8 Online
OpenStudy (anonymous):

PETRIFICATION OCCURS WHEN

OpenStudy (gottennis121):

I wonder if this is a multiple choice, but maybe this could help! http://www.todayifoundout.com/index.php/2012/05/how-things-become-petrified/

OpenStudy (alika456):

it occurs when the organic matter is completely replaced by minerals and the fossil is turned to stone

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