Mean atmospheric O2
Geologic Time Scale
Cordaites & Araucaria rainstorm
A forest of gymnosperms of the genus Cordaites and evergreen coniferous trees of the genus Araucaria in a rainstorm during the Late (Lopingian) Permian/Early Triassic period about 250 million years ago. In the foreground is a generic amphibian from the period.
Copyright © Walter B. Myers. All rights reserved.
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