Question 4 • CV Q4 M/J Science 3 Adv 2002110 Compacted Review of Grade.7.Life for SSA Prep
A mold fossil forms when an organism’s remains leave a hollow impression in surrounding rock. For that impression to remain, the organism’s hard parts must dissolve away after being buried. Filling a mold with sediment or minerals creates a cast fossil, not the mold itself.
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