Unit 1 (7 ft. below top), upper shale member, Mahantango Fm., Amity Hall, PA: Givetian, Pennsylvania
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Crinoidea
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Crinoidea indet.
Miller 1821
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| common (columnals) | ||||||||||
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Cephalopoda
- Pseudorthocerida
- Spyroceratidae
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Spyroceras ? nuntium
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| present | ||||||||||
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Stenolaemata
- Cryptostomata
- Acanthocladiidae
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Polypora sp.
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| present | ||||||||||
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Stenolaemata
- Cryptostomata
- Fenestellidae
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Fenestella cf. emaciata
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| abundant | ||||||||||
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Fenestella cf. sinuosa
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| common | ||||||||||
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Rhynchonellata
- Spiriferida
- Elythidae
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Elytha fimbriata
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| common | ||||||||||
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Rhynchonellata
- Spiriferida
- Mucrospiriferidae
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Mucrospirifer mucronatus
(Conrad 1841)
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| common | ||||||||||
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Rhynchonellata
- Spiriferida
- Spinocyrtiidae
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Spinocyrtia granulosa
(Conrad 1839)
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| present | ||||||||||
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Rhynchonellata
- Spiriferida
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Pustulatia pustulosa
Hall 1860
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| abundant | ||||||||||
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Rhynchonellata
- Atrypida
- Atrypidae
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Atrypa reticularis
(Linnaeus 1758)
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| common | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Sapphicorhynchidae
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Camarotoechia sappho
(Hall 1860)
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| common | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Camarotoechiidae
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Camarotoechia sp.
Hall and Clarke 1893
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| present | ||||||||||
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Strophomenata
- Orthotetida
- Schuchertellidae
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Schuchertella variabilis
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| common | ||||||||||
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Strophomenata
- Strophomenida
- Chonetidae
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Chonetes sp.
Fischer de Waldheim 1830
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| common | ||||||||||
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Devonochonetes scitulus
(Hall 1857)
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| present | ||||||||||
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Strophomenata
- Strophomenida
- Douvillinidae
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Douvillina inaequistriata
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| common | ||||||||||
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Trilobita
- Phacopida
- Phacopidae
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Phacops rana
(Green 1832)
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| common | ||||||||||
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Ostracoda
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Ostracoda indet.
Latreille 1802
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| present | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Pennsylvania |
| Coordinates: | 40.4° North, 77.0° West (view map) | ||
| Paleocoordinates: | 33.5° South, 45.4° West (Wright 2013) | ||
| Geographic resolution: | small collection |
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: | 387.7 - 382.7 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Hamilton | Formation: | Mahantango | Member: | Upper shale |
| Local section: | Amity Hall | Local bed: | unit 10--7 ft. below top | ||
| Local order: | top to bottom | ||||
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | gray "shale" | ||
| Lithology description: shale, medium dark gray to dark greenish gray | |||
| Environment: | marine indet. | Tectonic setting: | foreland basin |
Taphonomy
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | paleoecologic analysis |
| Taxonomic list comments:Relative abundance info: present (1 specimen collected), common (2-10 specimens collected), abundant (more than 10 specimens collected), very abundant (sample extremely rich in a given species) | |
Metadata
| Database number: | 9912 | ||
| Authorizer: | A. Miller | Enterer: | K. Layou | Research group: | marine invertebrate |
| Created: | 2001-01-30 12:01:00 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2001-01-30 12:01:00 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 841. | R. L. Ellison. 1965. Stratigraphy and Paleontology of the Mahantango Formation in south-central Pennsylvania. Pennsylvania Geological Survey Bulletin G48 1-298 [A. Miller/K. Layou] |