Fossil Preservation

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Across
  1. 2. when the original organism is completely replaced by another material (mineral or sediment) to form a replica
  2. 5. style of fossil preservation where the chemical composition of hard parts is unchanged but the crystal structure is altered
  3. 9. physical wearing away of hard parts
  4. 12. chemical wearing away of hard parts
  5. 13. the breakage of individual skeletal components
Down
  1. 1. style of fossil preservation where microscopic pore spaces are infilled by a mineral such as silica
  2. 3. the study of what happens to an organism between death and discovery as a fossil
  3. 4. the separation of individual skeletal components
  4. 6. style of fossil preservation where volatile components are driven off to leave a carbon film
  5. 7. one form of calcium carbonate that forms the hard parts of many shelly organisms
  6. 8. style of fossil preservation where the hard parts are substituted by minerals from the surrounding sediment
  7. 10. lack of this gas is very important in preventing decay of soft tissues
  8. 11. skeletal material typical of vertebrate bones and teeth (also known as calcium phosphate)