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10 cards from this deck
Info from all fossils arranged chronologically
Rapid burial, sediment compaction, sedimentary rock formation
Rapid diversification of multicellular life with hard parts
Rock formed from accumulation & hardening of sediment
Distinctive, large population, widespread, short existence
Shows traits of both ancestral & descendant groups
Determines age by comparing position to other fossils/layers
Time for half a radioisotope sample to decay
5,730 years
Rapid sediment, low temp, low oxygen, protection from scavengers
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