USNM9269, Block 2, Khao Chang Hill, Rat Buri: Roadian, Thailand

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Strophomenata - Orthotetida - Meekellidae
Meekella colpata Grant 1976
6 specimens
Strophomenata - Productida
Marginifera otaria Grant 1976
50 specimens
recombined as Marginifera (Otariella) otaria
Rhynchonellata - Orthida - Schizophoriidae
Orthotichia waterhousei Grant 1976
3 specimens
recombined as Kotlaia waterhousei
Rhynchonellata - Spiriferida - Ambocoeliidae
Orbicoelia fraterculus Waterhouse and Piyasin 1970
1 specimen
Rhynchonellata - Athyridida - Athyrididae
Composita subsolana Grant 1976
5 specimens
recombined as Posicomta subsolana
Cleiothyridina seriata Grant 1976
28 specimens
Rhynchonellata - Terebratulida - Gillediidae
Hemiptychina mintrita Grant 1976
6 specimens
see common names

Geography
Country:Thailand State/province:Ratchaburi
Coordinates: 13.4° North, 99.8° East (view map)
Paleocoordinates:30.9° South, 100.5° 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 sampled were either "in place" in the limestone mass; others were from float. But because the jungle terrain makes measurement of stratigraphic sections difficult, the stratigraphy is unknown. 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:black lithified argillaceous,carbonaceous "limestone"
Includes fossils?Y
Lithology description: Black limestone that left a large residue of carbonaceous clay after acid leaching
Environment:offshore shelf
Geology comments: Calm water below wave base
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),surface (in situ),chemical,field collection
Reason for describing collection:paleoecologic analysis
Taxonomic list comments:Concentrated on brachiopods; other groups are briefly mentioned in text for the locality in general but not reported in detail for individual blocks.
Metadata
Database number:40865
Authorizer:D. Bottjer Enterer:M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2004-07-02 08:50:49 Last modified:2011-05-14 14:07:11
Access level:the public Released:2004-07-02 08:50:49
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]