Read Edit View history 二叠系 èrdiéxì Permian System Origin Definitions Defs Strokes Stroke Words Sentences Sents 二叠系 二疊系 èrdiéxì Permian System The sequence of rock layers deposited during the Permian Period; specifically the strata belonging to the late Paleozoic Era. Frequency Written text 0.184 per million Cross-References See 二叠纪 èrdiéjì Sources Frequency data BCC Corpus (BLCU)
二叠系 二疊系 èrdiéxì Permian System The sequence of rock layers deposited during the Permian Period; specifically the strata belonging to the late Paleozoic Era. Frequency Written text 0.184 per million Cross-References See 二叠纪 èrdiéjì Sources Frequency data BCC Corpus (BLCU)