Ledyard Shale Member, Ludlowville Formation, marcasite concretion fauna, western: Givetian, New York
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Tentaculita
- Styliolinida
- Styliolinidae
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Styliolina fissurella
(Hall 1879)
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| r | ||||||||||
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Strophomenata
- Strophomenida
- Chonetidae
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Chonetes mucronatus
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| rr | ||||||||||
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Chonetes setigerus
(Hall 1843)
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| recombined as Hallinetes setigera | ||||||||||
| r | ||||||||||
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Strophomenata
- Strophomenida
- Anopliidae
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Chonetes lepidus
(Hall 1857)
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| recombined as Klocinetes lepidus | ||||||||||
| rc | ||||||||||
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Rhynchonellata
- Spiriferida
- Mucrospiriferidae
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Mucrospirifer mucronatus
(Conrad 1841)
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| r | ||||||||||
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Rhynchonellata
- Spiriferida
- Ambocoeliidae
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Ambocoelia umbonata
Conrad 1842
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| r | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Leiorhynchidae
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Leiorhynchus laura
(Billings 1860)
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| cc | ||||||||||
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Gastropoda
- Bellerophontida
- Bellerophontidae
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Bucanopsis leda
(Hall 1859)
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| recombined as Retispira leda | ||||||||||
| rr | ||||||||||
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Gastropoda
- Euomphalina
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Serpulospira laxus
(Hall 1859)
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| original and current combination Euomphalus luxus | ||||||||||
| rr | ||||||||||
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Bivalvia
- Nuculanida
- Cucullellidae
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Nuculites triqueter
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| r | ||||||||||
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Bivalvia
- Myalinida
- Lunulacardiidae
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Pterochaenia fragilis
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| c | ||||||||||
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Ostracoda
- Hollinocopida
- Primitiopsidae
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Primitiopsis punctulifera
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| r | ||||||||||
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Trilobita
- Phacopida
- Phacopidae
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Phacops rana
(Green 1832)
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| recombined as Eldredgeops rana | ||||||||||
| rr | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | New York | County: | Erie/Genesee |
| Coordinates: | 42.9° North, 78.4° West (view map) | ||||
| Paleocoordinates: | 36.6° South, 25.9° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | local area |
Time
| Period: | Devonian | Epoch: | Middle Devonian |
| Stage: | Givetian | 10 m.y. bin: | Devonian 3 | *Local age/stage: | Erian |
| Key time interval: | Givetian | ||
| Age range of interval: | 387.70000 - 382.70000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Hamilton | Formation: | Ludlowville | Member: | Ledyard |
| Stratigraphic resolution: | member |
Lithology and environment
| Primary lithology: | gray argillaceous "shale" | ||
| Lithology description: soft argillaceous shale, brown to dark gray | |||
| Environment: | deep subtidal shelf | Tectonic setting: | foreland basin |
Taphonomy
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Taxonomic list comments:Author gives no definition for relative abundance information codes, but I assume they are based on rare, common, abundant scales. This information is recorded in comment field. | |
Metadata
| Database number: | 10457 | ||
| Authorizer: | A. Miller | Enterer: | K. Layou |
| Modifier: | C. Ferguson | Research group: | marine invertebrate |
| Created: | 2001-04-18 08:36:36 | Last modified: | 2004-04-27 18:49:57 |
| Access level: | the public | Released: | 2001-04-18 12:04:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 3859. | D. W. Fisher. 1951. Marcasite fauna in the Ludlowville Formation of western New York. Journal of Paleontology 25(3):365-371 [A. Miller/K. Layou] |