Pitkin mud mounds, type 2: Chesterian, Arkansas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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informal Thrombolite indet.
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informal Stromatolite indet.
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Porostromata
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Rectangulina sp.
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Cyanophyceae
- Garwoodiaceae
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Nostocites sp.
Maslov 1929
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? Garwoodia sp.
Wood 1941
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? Ortonella kershopensis
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Cyanophyceae
- Aphralysiaceae
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? Aphralysia sp.
Garwood 1914
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Hormogoneae
- Oscillatoriales
- Girvanellaceae
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Girvanella sp.
Nicholson and Etheridge 1878
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unclassified
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Porifera indet.
Grant 1836
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Anthozoa
- Auloporida
- Multithecoporidae
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Multithecopora sp.
Yoh 1927
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Anthozoa
- Stauriida
- Amplexidae
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Amplexus sp.
Sowerby 1814
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Anthozoa
- Stauriida
- Polycoeliidae
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Kinkaidia trigonalis
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Anthozoa
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Parvaxon minutum
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Stenolaemata
- Cystoporida
- Hexagonellidae
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Hexagonellidae indet.
Crockford 1947
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Stenolaemata
- Cryptostomata
- Fenestellidae
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Archimedes sp.
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unclassified
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Brachiopoda indet.
Cuvier 1805
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Annelida indet.
Lamarck 1809
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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Bivalvia
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Bivalvia indet.
Linnaeus 1758
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Crinoidea
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Crinoidea indet.
Miller 1821
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unclassified
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Asphaltina sp.
Mamet 1972
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Florideophyceae
- Cryptonemiales
- Archaeolithophyllaceae
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? Archaeolithophyllum sp.
Johnson 1956
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Arkansas | County: | Searcy |
| Coordinates: | 35.8° North, 92.5° West (view map) | ||||
| Paleocoordinates: | 12.9° South, 34.6° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | local area |
Time
| Period: | Carboniferous | Epoch: | Mississippian |
| 10 m.y. bin: | Carboniferous 2-3 | ||
| Key time interval: | Chesterian | ||
| Age range of interval: | 335.80000 - 323.20000 m.y. ago |
Stratigraphy
| Formation: | Pitkin | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: stratigraphically higher than type 1 mounds | |||||
Lithology and environment
| Primary lithology: | lithified grainstone |
| Secondary lithology: | lithified mudstone |
| Lithology description: type 2 mud mounds: synoptic relief of 6 m, not so sharp boundaries to the surrounding facies | |
| Environment: | reef, buildup or bioherm |
| Geology comments: deeper water than type 1 mounds | |
Taphonomy
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | peel or thin section,field collection |
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Also known as: | Reef 2274 | ||
| Database number: | 76853 | ||
| Authorizer: | W. Kiessling | Enterer: | U. Merkel | Research group: | marine invertebrate |
| Created: | 2007-12-04 02:56:20 | Last modified: | 2007-12-04 04:56:20 |
| Access level: | authorizer only | Released: | 2009-12-04 02:56:20 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 25984. | G. E. Webb. 1987. Late Mississippian thrombolite bioherms from the Pitkin Formation of northern Arkansas. Geological Society America Bulletin 99:686-698 [W. Kiessling/U. Merkel] |