FOSSILS.
{
Between the Rock
}
© Stuart Ford
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Field Notes
Glossary
Phylum > MOLLUSCA
Class > CEPHALOPODS
Order >
AMMONITES
BELEMNITES
Cephalopods: 497 mya – present
^
541
485.4
443.8
419.2
358.9
298.9
251.902
201.3
145
66
23.03
2.58
(mya) million years ago
Cambrian
Ordovician
Silurian
Devonian
Carboniferous
Permian
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
Quaternary