Sihetun, Yixian bed 8: Late/Upper Barremian - Early/Lower Aptian, China
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Zhangheotheriidae
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Zhangheotherium quinquecuspidens
Hu et al. 1997
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Near-complete skeleton | ||||||||||
Reptilia
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Pterodactyloidea indet.
Plieninger 1901
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Reptilia
- Anurognathidae
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Dendrorhynchus curvidentatus n. gen., n. sp.
Ji and Ji 1998
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Ji et al. 1999 | 1 individual | ||||||||
recombined as Dendrorhynchoides curvidentatus | ||||||||||
GMV 2128, incomplete skeleton | ||||||||||
Peipiaosteidae
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Peipiaosteus pani
Liu and Zhou 1965
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see common names |
Geography
Country: | China | State/province: | Liaoning |
Coordinates: | 41.6° North, 120.9° East (view map) | ||
Paleocoordinates: | 44.3° North, 122.7° East | ||
Basis of coordinate: | based on nearby landmark | ||
Altitude: | 152 meters | ||
Geographic resolution: | local area |
Time
Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
Stage: | Barremian | ||
*Period: | Late/Upper Jurassic - Early/Lower Cretaceous | *Epoch: | Early/Lower Malm - Middle Gallic |
*International age/stage: | Early/Lower Oxfordian - Late/Upper Albian | ||
Key time interval: | Late/Upper Barremian - Early/Lower Aptian | ||
Age range of interval: | 125.77000 - 119.50000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Geological group: | Jehol | Formation: | Yixian | Member: | Jianshangou |
Regional section: | Yixian | Regional bed: | 8 | ||
Regional order: | bottom to top | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: several meters above beds bearing Sinosauropteryx and Confuciusornis; authors use "Chaomidianzi Formation" but this is part of Yixian.
"age of 129.7 ± 0.5 Ma for a basaltic lava from the bottom of the Yixian Formation and an age of 122.1 ± 0.3 Ma for a tuff from the lowermost part of the overlying Jiufotang Formation" (Chang et al. 2009) |
Lithology and environment
Primary lithology: | planar lamination siltstone |
Secondary lithology: | planar lamination,black,gray silty mudstone |
Includes fossils? | Y |
Includes fossils? | Y |
Environment: | lacustrine indet. |
Taphonomy
Modes of preservation: | body,adpression,soft parts |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | excellent |
Articulated whole bodies: | many |
Associated major elements: | some |
Disassociated major elements: | some |
Disassociated minor elements: | none |
Collection methods and comments
Collection excludes: | some macrofossils |
Collection methods: | selective quarrying,field collection |
Reason for describing collection: | biostratigraphic analysis |
Metadata
Database number: | 10761 | ||
Authorizer: | M. Carrano | Enterer: | M. Carrano |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 2001-06-19 13:05:33 | Last modified: | 2023-11-07 12:53:04 |
Access level: | the public | Released: | 2001-06-19 13:05:33 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
13533. | ETE | X. Wang, Y. Wang, Y. Wang, X. Xu, Z. Tang, F. Zhang, and Y. Hu. 1998. Stratigraphic sequence and vertebrate-bearing beds of the lower part of the Yixian Formation in Sihetun and neighboring area, western Liaoning, China. Vertebrata PalAsiatica 36(2):81-101 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
33194 | S.-C. Chang, H. Zhang, P. R. Renne and Y. Fang. 2009. High-precision 40Ar/39Ar age for the Jehol Biota. Palaeogeography, Palaeoclimatology, Palaeoecology 280:94-104 [R. Butler/R. Butler] | |
31370 | S. Ji and Q. Ji. 1998. [A new fossil pterosaur (Rhamphorhynchoidea) from Liaoning]. Jiangsu Geology 22(4):199-206 [R. Butler/R. Butler/M. Carrano] | |
4004 | 5% 1840 | S. -A. Ji, Q. Ji, and K. Padian. 1999. Biostratigraphy of two new pterosaurs from China. Nature 398:573-574 [M. Carrano/M. Carrano/J. Alroy] |
86337 | B. Jiang, F. T. Fürsich, and M. Hethke. 2012. Depositional evolution of the Early Cretaceous Sihetun Lake and implications for regional climatic and volcanic history in western Liaoning, NE China. Sedimentary Geology 257–260:31-44 [M. Carrano/M. Carrano] |