Bottom 30’ of section just east of Smith Basin, Fort Ann: Stairsian, New York
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Euomphalina
- Ophiletidae
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Lecanospira compacta
(Salter 1859)
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Flower 1968 | |||||||||
| Lecanospira sp.; occurs above the other gastropods | ||||||||||
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Gastropoda
- Euomphalina
- Macluritidae
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Lesueurilla imperfecta n. sp.
Flower 1968
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Flower 1968 | |||||||||
| recombined as Macluritella imperfecta | ||||||||||
| Lesueurilla sp. | ||||||||||
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Gastropoda
- Euomphalina
- Raphistomatidae
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Ophileta macroconica n. sp.
Flower 1968
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Flower 1968 | |||||||||
| synonym of Ceratopea canadensis | ||||||||||
| Ophileta sp. | ||||||||||
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Gastropoda
- Sinuopeidae
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Euconia sinuata n. sp.
Flower 1968
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Flower 1968 | |||||||||
| Euconia sp. | ||||||||||
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Gastropoda
- Murchisoniina
- Hormotomidae
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Plethospira bilineata n. sp.
Flower 1968
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Flower 1968 | |||||||||
| recombined as Hormotoma bilineata | ||||||||||
| Plethospira sp., 2 species | ||||||||||
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Plethospira subangulata n. sp.
Flower 1968
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Flower 1968 | |||||||||
| synonym of Plethospira cassina | ||||||||||
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Cephalopoda
- Endocerida
- Proterocameroceratidae
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Clitendoceras sp.
Ulrich and Foerste 1936
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rare category | |||||||||
| "transported?" | ||||||||||
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Proendoceras sp.
Flower 1955
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Flower 1968 | |||||||||
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Cephalopoda
- Tarphycerida
- Estonioceratidae
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Aphetoceras sp.
Hyatt 1894
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rare category | |||||||||
| "transported?" | ||||||||||
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Cephalopoda
- Tarphycerida
- Tarphyceratidae
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Seelyoceras sp.
Ulrich and Foerste 1936
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rare category | |||||||||
| "transported?" | ||||||||||
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Campbelloceras sp.
Ulrich and Foerste 1936
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rare category | |||||||||
| "transported?" | ||||||||||
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Cephalopoda
- Ellesmerocerida
- Ellesmeroceratidae
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Bassleroceras sp.
Ulrich and Foerste 1936
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rare category | |||||||||
| "transported?" | ||||||||||
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Rhynchonellata
- Pentamerida
- Clarkellidae
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Diaphelasma cf. oklahomense
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Flower 1968 | |||||||||
| Diaphelasma sp. | ||||||||||
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Trilobita
- Proetida
- Hystricuridae
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Hystricurus cf. conicus
(Billings 1859)
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Flower 1968 | |||||||||
| Hystricurus sp. | ||||||||||
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Crinoidea
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? Crinoidea indet.
Miller 1821
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| originally entered as "? Crinoidea indet." | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | New York |
| Coordinates: | 43.9° North, 73.4° West (view map) | ||
| Paleocoordinates: | 31.5° South, 67.2° West | ||
| Basis of coordinate: | based on nearby landmark |
Time
| Period: | Ordovician | Epoch: | Early/Lower Ordovician |
| Stage: | Tremadocian | 10 m.y. bin: | Ordovician 1 | *Epoch: | Arenig | *Local age/stage: | Demingian |
| Key time interval: | Stairsian | Conodont zone: | Macerodus dianae |
| Age range of interval: | 482.00000 - 480.30000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Fort Ann | ||||
| Local section: | East of Smith Basin | Local bed: | 1-30 ft | ||
| Local order: | bottom to top | ||||
| Stratigraphy comments: Given as Demingian in Mazzullo & Friedman, but Jeffersonian on all later charts (PJW3).
Landing & Westrop (2006 J. Paleo 80:960) give this as Macerodus dianae conodont zone & Paraplethopeltis seelyi faunal zone. | |||||
Lithology and environment
| Primary lithology: | "limestone" | ||
| Environment: | peritidal | Tectonic setting: | passive margin |
| Geology comments: "limestone (mottled algalaminite, some channel) subtidal, very shallow to low intertidal BA1. Stable ocean facing shelf." | |||
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
| Taxonomic list comments:Mazzullo and Friedman's 1977 list (Table 1) was provided by D.W. Fisher, but he obviously got it from Flower's papers. | |
Metadata
| Also known as: | Was: Champlain Valley, Fort Ann Fm., early Arenig, New York | ||
| Database number: | 289 | ||
| Authorizer: | J. Sepkoski, P. Wagner | Enterer: | M. Sommers, P. Wagner |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 1998-11-20 10:07:18 | Last modified: | 2017-01-26 19:52:07 |
| Access level: | the public | Released: | 1998-11-20 10:07:18 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 34760. | S. J. Mazzullo and G. M. Friedman. 1977. Competitive algal colonization of peritidal flats in a schizohaline environment; the lower Ordovician of New York. Journal of Sedimentary Petrology 47(1):398-410 [P. Wagner/P. Wagner/P. Wagner] |
Secondary references:
| 10680 | R. H. Flower. 1968. Part II - Fossils from the Smith Basin Limestone of the Fort Ann Region New York. New Mexico Institute of Mining and Technology Memoir 22(1):22-27 [P. Wagner/P. Wagner/P. Wagner] |