Unit 2 (7 ft. below top), upper shale member, Mahantango Fm., New Bloomfield, PA: Givetian, Pennsylvania
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Solenida
- Orthonotidae
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Orthonota undulata
Conrad 1841
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| present | ||||||||||
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Lingulata
- Lingulida
- Lingulidae
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Lingula delia
Hall 1867
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| present | ||||||||||
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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
- Elythidae
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Elytha fimbriata
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| synonym of Elita | ||||||||||
| present | ||||||||||
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Rhynchonellata
- Spiriferida
- Adolfiidae
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Spirifer tullius
(Hall 1867)
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| recombined as Allanella tullius | ||||||||||
| common | ||||||||||
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Rhynchonellata
- Orthida
- Rhipidomellidae
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Rhipidomella vanuxemi
(Hall 1857)
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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 (columnals) | ||||||||||
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Stenolaemata
- Cystoporata
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Fistuliporoidea indet.
Astrova 1964
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| common | ||||||||||
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Trilobita
- Phacopida
- Homalonotidae
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Trimerus (Dipleura) dekayi
Green 1832
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| present | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Pennsylvania |
| Coordinates: | 40.4° North, 77.2° West (view map) | ||
| Paleocoordinates: | 39.1° South, 25.5° West | ||
| 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: | 387.70000 - 382.70000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Hamilton | Formation: | Mahantango | Member: | Upper shale |
| Local section: | New Bloomfield | Local bed: | unit 2--7 ft. below top | ||
| Local order: | top to bottom | ||||
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | gray,green argillaceous siltstone | ||
| Lithology description: siltstone, argillaceous, medium greenish gray, in 1-18 inch beds | |||
| 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: | 9902 | ||
| Authorizer: | A. Miller | Enterer: | K. Layou | Research group: | marine invertebrate |
| Created: | 2001-01-30 12:01:00 | Last modified: | 2001-08-30 17:52:51 |
| Access level: | the public | Released: | 2001-01-30 12:01:00 |
| Creative Commons license: | CC BY |
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] |