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
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 | |
Mucophyllum sp. Etheridge 1894 horn coral | |
Cystiphyllum sp. Lonsdale 1839 horn coral | |
Tryplasma sp. Lonsdale 1845 horn coral | |
Rhizophyllum sp. Lindström 1866 horn coral | |
Heliolites sp. Dana 1846 tabulate coral | |
Pseudoplasmopora sp. Bondarenko 1963 tabulate coral | |
Favosites sp. Lamarck 1816 tabulate coral
Squameofavosites sp. Chernyshev 1941 tabulate coral
Pachyfavosites sp. Sokolov 1952 tabulate coral | |
Strophomenata | |
Protochonetes sp. Muir-Wood 1962 | |
Rhynchonellata | |
Dicoelosia sp. King 1850 | |
Isorthis sp. Kozlowski 1929 | |
Skenidioides sp. Schuchert and Cooper 1931 | |
Atrypa sp. Dalman 1828 | |
Delthyris sp. Dalman 1828 | |
Nucleospira sp. Hall 1859 | |
""Protathyrisina" sp." = Retziella
""Protathyrisina" sp." = Retziella Nikiforova 1937 | |
Trilobita | |
Odontopleura sp. Emmrich 1839 trilobite | |
Calymene sp. Brongniart 1822 trilobite |