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Xiayan, China
| Formation | Xiayan |
|---|---|
| Age: | 466 - 450 Ma Ordovician |
| Interval | Llanvirn |
| Lithology | claystone, sandstone/"shale", "shale"/sandstone |
| Number of Collections | 4 |
| Number of Occurrences | 50 |
Recorded Sample Locations
| Location | Region | Stratigraphic Name |
|---|---|---|
| Upper portion | Tianzhu Co., Wuwei, Gansu, China | Xiayan |
| YinGou Group | Golmud City (Ge'ermu Co.), Haixi Mongol and Tibetan Autonomous Prefecture, Qinghai, China | Xiayan |
| XiaYanFarm | Dunhuang Co., Jiuquan, Gansu, China | XiaYan |
Associated Units
| Stratigraphic Name | Age | Lithology | Occurrence Records |
|---|---|---|---|
| Gulang | 450 - 446 Ma Late/Upper Ordovician | dolomite/"limestone", sandstone/lime mudstone, "shale"/"limestone", "limestone" | 42 |
| Koumengzi | 450 - 443 Ma Paleozoic | limestone, sandstone/"limestone", "limestone"/"shale" | 33 |
| Putonggou - Middle | 419 - 411 Ma Early/Lower Devonian | shale/"reef rocks" | 3 |
| Shanyan - Upper | 466 - 450 Ma Ordovician | sandstone/"limestone" | 6 |
| ZhongYan | 479 - 466 Ma Ordovician | limestone/sandstone | 8 |
Recorded Fossils
References
| Stratigraphic Group of Quing Hai Province (1980) Regional stratigraphic tables of the north western China region: Volume of NinXia Province, Geological Publishing House, Beijing, China |
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
