Original Preservation

• Natural mummification by drying

Unaltered Preservation

• Amber Deposits

Unaltered Preservation

• Bison and Woolly Mammoth Skin and Hair

Permineralization/Petrification• Common preservation

in wood and bone• Which image is the

altered/permineralized bone?

Petrification

• Petrified wood from the Petrified Forest National Park in Arizona

Replacement

• Silica replacement of carbonate shell

• What kind of animal is this?

Replacement

• Note new mineral that has replaced carbonate shell

• What kind of fossil animal is shown?

Carbonization

• Common in plants and animal soft parts

Molds and Casts

• What kind of animal is shown by this fossil?

Molds/Impressions

• What animals are shown by the impressions?

Trace Fossils

• Burrows

• Indicate movement, activity of organism

Trace Fossils

• Coprolites

Trace Fossils

• Footprints, trackways• Note molds and casts