Terrestrial Communities

Fossil dig
Fossil dig in the Wellington Formation north of Stillwater, Okla. This site, discovered in a bulldozer push, revealed exquisitely preserved fossil leaves of Permian seed plants (about 275 million years old).

Although Oklahoma is now located far north of Earth's equator, it once lay south of the equator and gradually drifted northward to its present position through plate tectonic activity. As it drifted, climates changed and plants evolved altering communities on land. Click below to learn about plant communities from the OrdovicianSilurian-Early Devonian, Late Devonian, Carboniferous and Permian periods.