Qiaergaye Formation (Middle) at Tangbaleman, SE of Toli Co., NW Xinjiang Prov.: Llandovery - Wenlock, China

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Favositida - Coenitidae
Placocoenites sp. Sokolov 1955
Anthozoa - Favositida - Theciidae
Angopora sp. (Jones 1936)
original and current combination Thecia (Angopora)
Anthozoa - Favositida - Favositidae
Favosites sp. Lamarck 1816
Favosites cf. gothlandicus Lamarck 1816
Palaeofavosites sp. (Twenhofel 1914)
original and current combination Paleofavosites
Mesofavosites sp. Sokolov 1951
Anthozoa - Heliolitida - Heliolitidae
Heliolites sp. Dana 1846
Anthozoa - Heliolitida - Stelliporellidae
Stelliporella sp. Wentzel 1895
Anthozoa - Stauriida - Ptychophyllidae
Ptychophyllum sp. Milne-Edwards and Haime 1850
Anthozoa - Stauriida - Spongophyllidae
Spongophyllum sp. Milne-Edwards and Haime 1851
Anthozoa - Stauriida - Disphyllidae
Disphyllum sp. Fromentel 1861
Anthozoa - Cystiphyllida - Tryplasmatidae
Tryplasma sp. Lonsdale 1845
Strophomenata - Strophomenida - Chonetidae
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena sp. Dalman 1828
Rhynchonellata - Atrypida - Atrypidae
Atrypa sp. Dalman 1828
Rhynchonellata - Pentamerida - Pentameridae
Pentamerus sp. Sowerby 1813
Rhynchonellata - Rhynchonellida - Camarotoechiidae
"Camarotoechia" sp. Hall and Clarke 1893
Trilobita - Phacopida - Phacopidae
Phacops sp. Emmrich 1839
Trilobita - Phacopida - Encrinuridae
Encrinurus sp. Emmrich 1844
see common names

Geography
Country:China State/province:Xinjiang
Coordinates: 46.0° North, 83.6° East (view map)
Paleocoordinates:7.7° South, 69.9° East
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period:Silurian
*Epoch:Late/Upper Llandovery - Wenlock
Key time interval:Llandovery - Wenlock
Age range of interval:443.80000 - 427.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Qiaergaye
Stratigraphic resolution:member
Stratigraphy comments: Except where otherwise stated, ref. 7624 uses Lower Silurian as equivalent to Llandovery, Middle Silurian as equivalent to Wenlock, and Upper Silurian as equivalent to Ludlow plus Pridoli. "...paleontologic evidence indicates an Upper Llandovery age for the graptolites, and possibly and Upper Llandovery or Wenlock age for the shelly fossils." Stratigraphic relations discussed by authors imply that the graptolites in type section are from below the middle part of the formation (i.e. below the part yielding shelly fossils).
Lithology and environment
Primary lithology:tuffaceous,gray,green,red or brown siltstone
Secondary lithology: sandstone
Lithology description: For formation as a whole: "The lithology consists of purple-red and gray, gray-green, tuffaceous siltstone, fine-grained sandstone, coarse-grained sandstone interbedded with sandy conglomerate. The thickness of the unit is 1320 m."
Environment:marine indet.
Geology comments: Correlation chart indicates ba2 based on graptolitic fauna.
Taphonomy
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:27816
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2003-01-13 14:55:23 Last modified:2006-09-13 14:01:03
Access level:the public Released:2003-01-13 14:55:23
Creative Commons license:CC BY
Reference information

Primary reference:
7624. E.-z. Mu, A. J. Boucot, X. Chen and J.-y. Rong. 1986. Correlation of the Silurian rocks of China. In A. J. Boucot and W. B. N. Berry (eds.), Geological Society of America Special Paper 202:1-80 [M. Foote/M. Foote/P. Wagner]