USNM9271, Block 8, Ko Muk Island northeast: Roadian, Thailand

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Strophomenata - Orthotetida - Meekellidae
Meekella addicta Grant 1976
1 specimen
Strophomenata - Orthotetida - Schuchertellidae
Schuchertella cooperi Grant 1976
7 specimens
Strophomenata - Orthotetida - Derbyiidae
Derbyia scobina Grant 1976
1 specimen
Strophomenata - Strophomenida - Anopliidae
Demonedys fastigiata Grant 1976
1 specimen
Strophomenata - Productida
Marginifera nesiotes Grant 1976
1 specimen
Strophomenata - Productida - Paucispiniferidae
Gratiosina insculpta Grant 1976
3 specimens
recombined as Transennatia insculpta
Strophomenata - Productida - Productidae
Stereochia litostyla Grant 1976
4 specimens
Strophomenata - Productida - Aulostegidae
Urushtenia murina Grant 1976
3 specimens
Strophomenata - Productida - Lyttoniidae
? Pseudoleptodus sp. Stehli 1956
1 specimen
Rhynchonellata - Rhynchonellida - Allorhynchidae
Terebratuloidea mimula Grant 1976
2 specimens
Rhynchonellata - Orthida - Rhipidomellidae
Rhipidomella cordialis Grant 1976
25 specimens
Rhynchonellata - Spiriferinida - Paraspiriferinidae
Callispirina austrina Grant 1976
1 specimen
Rhynchonellata - Spiriferida - Ambocoeliidae
Cruricella couria Grant 1976
25 specimens
Rhynchonellata - Spiriferida - Spiriferellidae
Tipispirifer oppilatus Grant 1976
5 specimens
Rhynchonellata - Athyridida - Athyrididae
Composita advena Grant 1976
6 specimens
recombined as Posicomta advena
see common names

Geography
Country:Thailand State/province:Trang
Coordinates: 7.4° North, 99.3° East (view map)
Paleocoordinates:31.3° South, 107.5° East
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Permian Epoch:Guadalupian
Stage:Roadian 10 m.y. bin:Permian 3
Key time interval:Roadian
Age range of interval:272.30000 - 268.80000 m.y. ago
Stratigraphy
Formation:Rat Buri
Stratigraphic resolution:group of beds
Stratigraphy comments: Blocks are derived from seacliffs, making it impossible to measure a stratigraphic section or determine whether they are derived from a single horizon. The age of the Rat Buri fauna is problematic. "Rat Buri" limestones likely range in age from Kungurian through Capitanian to perhaps Wuchiapingian. Wordian fusulinids appear most common in other collections, but are not found in association with the brachiopod localities. The brachopod fauna is most similar to the Wordian Amb Formation of the Salt Range, in Pakistan, tentatively indicating a Wordian age.
Lithology and environment
Primary lithology: lithified argillaceous,sandy "limestone"
Includes fossils?Y
Environment:offshore shelf
Geology comments: Interpreted as rather quiet water that was deep enough not to be disrupted by ordinary wave action. It was a fairly flat sea floor bearing an abundant fauna of small organisms with bryozoans and crinoids in patches like gardens.
Taphonomy
Modes of preservation:body,replaced with silica
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:bulk,surface (float),chemical,field collection
Reason for describing collection:paleoecologic analysis
Taxonomic list comments:Concentrates on brachiopods, and other groups are listed only in the text for the generic total collection, not for the subset individual blocks.
Metadata
Database number:40877
Authorizer:D. Bottjer Enterer:M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2004-07-02 10:22:34 Last modified:2011-05-14 14:52:57
Access level:the public Released:2004-07-02 10:22:34
Creative Commons license:CC BY
Reference information

Primary reference:

11031. R. E. Grant. 1976. Permian brachiopods from southern Thailand. Paleontological Society Memoir 9:1-269 [D. Bottjer/M. Clapham/M. Clapham]