Unit 20, Tongzhi Fm., Honghuayuan and Tongzhi, Guizhou Prov., China: Tremadoc, China

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Orthida - Hesperonomiidae
Hesperonomia sp. Ulrich and Cooper 1936
Rhynchonellata - Orthida - Eoorthidae
Apheoorthis sp. Ulrich and Cooper 1936
[entered as Apheorthis sp.]
Trilobita - Asaphida - Taihungshaniidae
Tungtzuella sp. Lu 1957
Trilobita - Asaphida - Asaphidae
Psilocephalina sp. Hsu 1948
see common names

Geography
Country:China State/province:Guizhou
Coordinates: 28.0° North, 107.0° East (view map)
Paleocoordinates:21.4° North, 143.4° East
Geographic resolution:local area
Time
Period:Ordovician Epoch:Early/Lower Ordovician
Stage:Tremadocian 10 m.y. bin:Ordovician 1
*Period:Early/Lower Ordovician *Epoch:Late/Upper Tremadoc
*International age/stage:Late/Upper Tremadoc
Key time interval:Tremadoc
Age range of interval:485.40000 - 477.70000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Tongzi
Local section:20
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology:ooidal lithified grainstone
Secondary lithology: "shale"
Lithology description: oolitic limestone and muddy shale
Environment:sand shoal
Taphonomy
Collection methods and comments
Collection excludes:species names
Metadata
Database number:5275
Authorizer:A. Miller Enterer:P. Novack-Gottshall
Research group:marine invertebrate
Created:1999-09-12 17:38:53 Last modified:1999-09-12 20:38:53
Access level:the public Released:2000-11-20 13:53:25
Creative Commons license:CC BY
Reference information

Primary reference:

288. R. Wang. 1981. Stratigraphic Summary of the Southwestern Region of China. Institute of Geology and Mine Deposit at Chengdu, Ministry of Geology (not published, copy of article deposited with A. I. Miller at the University of Cincinnati, received through S. Mao) 14-61 [A. Miller/P. Novack-Gottshall]