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
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Meekella colpata
Grant 1976
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6 specimens | ||||||
Strophomenata
- Productida
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Marginifera otaria
Grant 1976
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50 specimens | ||||||
recombined as Marginifera (Otariella) otaria | |||||||
Rhynchonellata
- Orthida
- Schizophoriidae
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Orthotichia waterhousei
Grant 1976
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3 specimens | ||||||
recombined as Kotlaia waterhousei | |||||||
Rhynchonellata
- Spiriferida
- Ambocoeliidae
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Orbicoelia fraterculus
Waterhouse and Piyasin 1970
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1 specimen | ||||||
Rhynchonellata
- Athyridida
- Athyrididae
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Composita subsolana
Grant 1976
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5 specimens | ||||||
recombined as Posicomta subsolana | |||||||
Cleiothyridina seriata
Grant 1976
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28 specimens | ||||||
Rhynchonellata
- Terebratulida
- Gillediidae
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Hemiptychina mintrita
Grant 1976
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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] |