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Geological Periods - Home

Cambrian Period
Ordovician Period
Silurian Period
Devonian Period
Carboniferous Period
Permian Period
Triassic Period
Jurassic Period
Cretaceous Period
Tertiary Period
Quaternary Period
The Tertiary Period
65 to 1.8 Million Years Ago

Established Theory:

Start:

Iridium Anomaly. Associated with a major extinction horizon (foraminifers, calcareous nannofossils, dinosaurs, etc.)

Index Fossils:

Graptolites, Gastropod and Pelecypod

Evolution:

Rich insect fauna, early bats, horses, camels, cats, dogs, rodents, advanced primates

Geography:

Formation of modern continents, formation of mountain ranges, major volcanic activity

Rocks:


Alternative Theory:

In Progress


Conclusions:

In Progress