二叠系 èrdiéxì Permian System Definitions Defs Origin 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)
