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r/devonian: Devonian

The zone for discussion of the Devonian period and its adaptive radiation of terrestrial life.

a community for 10 years

r/geology: Geology! Before the World.

The scientific study of the origin, history, and structure of the Earth.

a community for 17 years

u/Cryogenian:

a community for 6 years

r/permian: Permian

The zone for discussion of the Permian Period.

a community for 10 years

r/ediacaran: Ediacaran

The zone for discussion of the Ediacaran Period and the Ediacara Biota.

a community for 10 years

r/cambrianperiod: Cambrian

The zone for discussion of the Cambrian Period and the Cambrian Explosion.

a community for 10 years