Ichnofabrics and Their Environmental Interpretation from Middle Triassic Youfangzhuang Formation, Jiyuan Region, Western Henan Province
- Received Date: 1900-01-01
- Rev Recd Date: 1900-01-01
- Publish Date: 2007-06-10
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Key words:
- littoral and very shallow sediments /
- ichnofabric /
- Jiyuan Region /
- Youfangzhuang Formation
Abstract: Abundant trace fossils are preserved in the alternation of purple and yellow greenish sandstones and mudstones which are formed in littoral and very shallow lake environments in the lower part of Middle Triassic Youfangzhuang Formation, Jiyuan Region, western Henan Province. Six ichnofabrics are found in highenergy zone of lake margin sandstones, they include: Porphyritic bioturbation ichnofabric, Skolithos isp.Planolites montanus ichnofabric,Skolithos verticalis ichnofabric, Planolites beverleyensis ichnofabric,Skolithos isp. Ichnofabric and Palaeophycus annulatus ichnofabric,and can be assigned to Skolithos ichnofacies;three ichnofabrics of Skolithos linearis ichnofabric、Taenidium barrette ichnofabric and rizoliths ichnofabric are recognized from middle and lower energy zone of very shallow lacustrine siltstones and mudstones, they belong to Scoyenia ichnofacies.
Citation: | QI Yongan. Ichnofabrics and Their Environmental Interpretation from Middle Triassic Youfangzhuang Formation, Jiyuan Region, Western Henan Province[J]. Acta Sedimentologica Sinica, 2007, 25(3): 372-379. |