Cambrian
Cambrian
First geological period of the Paleozoic Era.
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Readers' pathsAug 2026 – Oct 2026
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Ordovician
Second period of the Paleozoic Era.
16%
Ediacaran
Third and last period of the Neoproterozoic Era.
10%
Precambrian
History of Earth 4600–539 million years ago.
8%
Paleozoic
First era of the Phanerozoic Eon.
3.7%
Fortunian
First stage of Cambrian Period.
2.4%
Geologic time scale
System that relates geologic strata to time.
2.2%
Silurian
Third period of the Paleozoic Era.
1.7%
Trilobite
Class of extinct, Paleozoic arthropods.
1.5%
Terreneuvian
First epoch of the Cambrian Period.
1.5%
Phanerozoic
Fourth and current eon of the geological timescale.
1.4%
Readers come from
Share of the 63,220 readers arriving from another article
Ordovician
Second period of the Paleozoic Era.
17%
Phanerozoic
Fourth and current eon of the geological timescale.
8.3%
Ediacaran
Third and last period of the Neoproterozoic Era.
7.6%
Paleozoic
First era of the Phanerozoic Eon.
7%
Precambrian
History of Earth 4600–539 million years ago.
4%
Neogene
Second geologic period in the Cenozoic Era.
1.7%
Carboniferous
Fifth period of the Paleozoic Era.
1.7%
Devonian
Fourth period of the Paleozoic Era.
1.6%
Geologic time scale
System that relates geologic strata to time.
1.6%
Silurian
Third period of the Paleozoic Era.
1.5%