Mayilashan Group, Upper Part, Near Karamay City, NW Xinjiang Province (Silurian of China)

Where: Xinjiang, China (45.5° N, 84.9° E: paleocoordinates 1.3° S, 71.0° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Mayilashan Group, Ludlow (427.4 - 423.0 Ma)

• 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.

• group-level stratigraphic resolution

Environment/lithology: marine; volcaniclastic, gray, green siliciclastic sediments and tuffaceous siltstone

• Correlation chart indicates BA3 based shelly fauna, at least for upper part of the Group.
• "The [group] consists mainly of gray-green and purple volcanoclastic rocks, intermediate and basic lavas, clastic rocks (tuffaceous siltstone), siliceous slate, and argillaceous siltstone. There is also intercalated sandstone, conglomerate, andesite porphyry, basalt, and basanite. Fossils, usually corals, brachiopods, and graptolites, occur in both the upper and lower parts...A thickness of 8438 m is mentioned."

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 27795: authorized by Michael Foote, entered by Michael Foote on 09.01.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Heliolitida - Heliolitidae
Heliolites sp.
Heliolites sp. Dana 1846 tabulate coral
 Favositida - Favositidae
Mesofavosites obliquus, Favosites sp., "Palaeofavosites moribundus" = Paleofavosites
Mesofavosites obliquus Sokolov 1951 tabulate coral
Favosites sp. Lamarck 1816 tabulate coral
"Palaeofavosites moribundus" = Paleofavosites tabulate coral
 Favositida - Pachyporidae
Cladopora sp.
Cladopora sp. Hall 1851 tabulate coral
 Stauriida - Laccophyllidae
Syringaxon sp.
Syringaxon sp. Lindström 1882 horn coral
 Stauriida - Kyphophyllidae
Kyphophyllum sp.
Kyphophyllum sp. Wedekind 1927 horn coral
 Cystiphyllida - Cystiphyllidae
Microplasma sp.
Microplasma sp. Dybowski 1873 horn coral
Pterobranchia
 Graptoloidea - Monograptidae
Pristiograptus cf. colonnus, Saetograptus cf. chimaera
Strophomenata
 Strophomenida - Chonetidae
? Chonetes sp.
? Chonetes sp. Fischer de Waldheim 1830
Rhynchonellata
 Atrypida - Atrypidae
? Atrypa sp.
? Atrypa sp. Dalman 1828
Stenolaemata
 Cryptostomata - Fenestellidae
Fenestella sp.
Fenestella sp. Lonsdale 1839