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B. The organism must be buried in sediment soon after it dies.

C - the organism must go through a process of petrification

Needed

  1. Moist sediment or soil
  2. organism trapped, dies
  3. lack of anything disturbing that area
  4. moistness ; warmth ; heat to break down additional layering
  5. pressure from more layers on top
  6. lengthy amount of time (millions of years)
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6y ago
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13y ago

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11y ago

The tissue of the organism decays over time, leaving the hard parts/bones still intact.

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