USNM9272, Block 4, Ko Muk Island northwest: Roadian, Thailand
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata
- Spiriferida
- Elythidae
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Anomaloria glomerosa
Grant 1976
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2 specimens | |||||||||
Rhynchonellata
- Spiriferida
- Ambocoeliidae
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Cruricella couria
Grant 1976
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23 specimens | |||||||||
Rhynchonellata
- Spiriferida
- Spiriferellidae
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Tipispirifer oppilatus
Grant 1976
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3 specimens | |||||||||
Rhynchonellata
- Athyridida
- Neoretziidae
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Hustedia ratburiensis
Waterhouse and Piyasin 1970
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17 specimens | |||||||||
(7 measurements) | ||||||||||
Hustedia funaria
Grant 1976
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10 specimens | |||||||||
Rhynchonellata
- Athyridida
- Athyrididae
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Composita advena
Grant 1976
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25 specimens | |||||||||
recombined as Posicomta advena | ||||||||||
Rhynchonellata
- Orthida
- Rhipidomellidae
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Rhipidomella cordialis
Grant 1976
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75 specimens | |||||||||
(12 measurements) | ||||||||||
Rhynchonellata
- Spiriferinida
- Spiriferellinidae
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Spiriferellina yanagidai
Grant 1976
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2 specimens | |||||||||
Rhynchonellata
- Spiriferinida
- Paraspiriferinidae
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Callispirina austrina
Grant 1976
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15 specimens | |||||||||
Rhynchonellata
- Rhynchonellida
- Wellerellidae
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? Uncinunellina sp.
Grabau 1932
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2 specimens | |||||||||
(1 measurement) | ||||||||||
Strophomenata
- Productida
- Productidae
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Stereochia litostyla
Grant 1976
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13 specimens | |||||||||
(7 measurements) | ||||||||||
Strophomenata
- Productida
- Productellidae
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Dyschrestia spodia
Grant 1976
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39 specimens | |||||||||
Bibatiola costata
Grant 1976
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3 specimens | |||||||||
Strophomenata
- Productida
- Linoproductidae
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Cancrinella sp.
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1 specimen | |||||||||
(1 measurement) | ||||||||||
Strophomenata
- Strophomenida
- Anopliidae
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Demonedys fastigiata
Grant 1976
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3 specimens | |||||||||
Strophomenata
- Strophomenida
- Rugosochonetidae
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Chonetinella cymatilis
Grant 1976
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80 specimens | |||||||||
recombined as Neochonetes (Sommeriella) cymatilis | ||||||||||
Strophomenata
- Orthotetida
- Meekellidae
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Perigeyerella tricosa
Grant 1976
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2 specimens | |||||||||
Strophomenata
- Orthotetida
- Schuchertellidae
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Streptorhynchus sulculatum
Grant 1976
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12 specimens | |||||||||
Craniata
- Craniida
- Craniidae
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Nematocrania crassa
Grant 1976
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1 specimen | |||||||||
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: | 273.01000 - 266.90000 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 "limestone" |
Includes fossils? | Y |
Lithology description: Ligher colour than Ko Muk NE, contains little to no sand and less mud. | |
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: | 40894 | ||
Authorizer: | D. Bottjer | Enterer: | M. Clapham |
Modifier: | M. Clapham | Research group: | marine invertebrate |
Created: | 2004-07-02 13:38:28 | Last modified: | 2011-05-14 15:11:37 |
Access level: | the public | Released: | 2004-07-02 13:38:28 |
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] |