Permian
Permian, last period of the Paleozoic era, stretching between c.280 and 230 million years ago.
Additional topics
21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Pennsylvania Dutch to Pima
Permian, last period of the Paleozoic era, stretching between c.280 and 230 million years ago.
21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Pennsylvania Dutch to Pima