Upper Erdaogou Fm. of Shenyang Institute, Yaokeng Section, Erdaogou (Devonian of China)

Where: Jilin, China (43.0° N, 127.0° E: paleocoordinates 14.5° S, 115.5° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Erdaogou Formation, Lochkovian (419.2 - 410.8 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. Several different working groups have studied this formation and have subdivided it differently. Ref. 7624 seems inclined to accept the subdivision of the Shenyang Institute into a lower, mainly siliciclastic unit that is Pridolian by ref. 7624, and an upper, mainly carbonate unit that is assigned to the Gedinnian by ref. 7624. Shales unconformably overlying this carbonate unit are thought to be Carboniferous (yield Productus and Fusella). An alternative lithologic sequence is given by Liu and Huang (1977), in which the lithologies mentioned are yellow-green siltstone, gray coarse-grained sandstone, and gray calcareous shale with intercalated limestone lenses. "This fauna was assigned by Liu and Huang to the Upper Silurian, but the Shenyang Institute assigned it to the Lower Devonian."

• member-level stratigraphic resolution

Environment/lithology: marine; gray limestone and marl

• Correlation chart indicates BA 4-5 position.
• "gray, thick-bedded limestone, thin-bedded marl, siltstone and marl lenses, with a thickness of no more than 100 m"

Collection methods: Collection 25840 is also from the upper part of this formation and has one element (Isorthis) in common with this collection, but does not appear to be a subset strictly speaking.

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 27748: authorized by Michael Foote, entered by Michael Foote on 08.01.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Anthozoa
 Stauriida - Mucophyllidae
Mucophyllum sp. Etheridge 1894 horn coral
 Cystiphyllida - Cystiphyllidae
Cystiphyllum sp. Lonsdale 1839 horn coral
 Cystiphyllida - Tryplasmatidae
Tryplasma sp. Lonsdale 1845 horn coral
 Cystiphyllida - Goniophyllidae
Rhizophyllum sp. Lindström 1866 horn coral
 Heliolitida - Heliolitidae
Heliolites sp. Dana 1846 tabulate coral
 Heliolitida - Pseudoplasmoporidae
Pseudoplasmopora sp. Bondarenko 1963 tabulate coral
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral
Squameofavosites sp. Chernyshev 1941 tabulate coral
Pachyfavosites sp. Sokolov 1952 tabulate coral
Strophomenata
 Strophomenida - Strophochonetidae
Protochonetes sp. Muir-Wood 1962
Rhynchonellata
 Orthida - Dicoelosiidae
Dicoelosia sp. King 1850
 Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
 Protorthida - Skenidiidae
Skenidioides sp. Schuchert and Cooper 1931
 Atrypida - Atrypidae
Atrypa sp. Dalman 1828
 Spiriferida - Delthyrididae
Delthyris sp. Dalman 1828
 Athyridida - Nucleospiridae
Nucleospira sp. Hall 1859
 Athyridida - Retziellidae
""Protathyrisina" sp." = Retziella
""Protathyrisina" sp." = Retziella Nikiforova 1937
Trilobita
 Odontopleurida - Odontopleuridae
Odontopleura sp. Emmrich 1839 trilobite
 Phacopida - Calymenidae
Calymene sp. Brongniart 1822 trilobite