Index Fossils
Phylum- Mollusk
Gastropod- sea snail
Mesozoic Era
Nerinea
Phylum- Chordates
Chondrichthyes-Shark tooth
Cenozoic Era
Carcharodon Megalodon
Phylum -Mollusk
Bivalve-Scallop/Oyster
Cenozoic Era
Pecten Gibbus
Phylum- Mollusk
Cephalopod-Ammonite- Now Extinct
Mesozoic Era
Perisphinctes Tiziani
Phylum- Arthropods
Trilobite – Now extinct
Paleozoic Era
Diacalymene Ouzregui
Phylum- Brachiopod
Brachiopod (Lamp or Butterfly Shell)
Paleozoic era
Mucrospirfer Mucronatus
Phylum- Cnidaria
Horn Coral- Now extinct
Mesozoic Era
Triplophyllites
Phylum- Mollusk
Bivalve- Clam
Cenozoic Era
Cucullaea Gigantea
Phylum- Mollusk
Bivalve- Large Saltwater Clam
Cenozoic Era
Dinocardium Robustum
Additional Information has been added in the following slides
Difference between a large shell and a small one
Difference in the hinged area
Growth Lines
Fossil Preservation --A mold of a fossil forms
when the organic matter of the organism
decomposes and leaves a cavity, or mold.
Casts form when the cavity fills with sediment or
minerals that harden.
Mold and Cast
Good examples of mold fossils
Carbonization
Soft Body parts can be preserved by:
Remains of a human found buried
in ice in the Italian Alps
Baby mammoth
In Amber- tree sap
In Tar
Permineralization/ Recrystalization