Unit 1, upper shale member, Mahantango Fm., Dromgold, PA: Givetian, Pennsylvania
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Strophomenata
- Strophomenida
- Leptostrophiidae
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Protoleptostrophia perplana
(Conrad 1839)
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abundant | ||||||||||
Strophomenata
- Strophomenida
- Anopliidae
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Chonetes lepidus
(Hall 1857)
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recombined as Klocinetes lepidus | ||||||||||
present | ||||||||||
Strophomenata
- Strophomenida
- Chonetidae
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Devonochonetes coronatus
(Hall 1857)
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present | ||||||||||
Rhynchonellata
- Spiriferida
- Spinocyrtiidae
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Mediospirifer ? audaculus
(Conrad 1842)
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present | ||||||||||
Rhynchonellata
- Spiriferida
- Adolfiidae
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Spirifer tullius
(Hall 1867)
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recombined as Allanella tullius | ||||||||||
abundant | ||||||||||
Rhynchonellata
- Spiriferida
- Mucrospiriferidae
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Mucrospirifer mucronatus
(Conrad 1841)
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present | ||||||||||
Tylothyris pauliformis
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present | ||||||||||
Rhynchonellata
- Tropidoleptidae
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Tropidoleptus carinatus
(Conrad 1839)
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abundant | ||||||||||
Rhynchonellata
- Rhynchonellida
- Camarotoechiidae
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Camarotoechia sp.
Hall and Clarke 1893
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common | ||||||||||
Rhynchonellata
- Orthida
- Rhipidomellidae
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Rhipidomella leucosia
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common | ||||||||||
Rhipidomella vanuxemi
(Hall 1857)
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common | ||||||||||
Stenolaemata
- Cystoporida
- Sulcoreteporidae
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Sulcoretepora incisurata
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abundant | ||||||||||
Bivalvia
- Ostreida
- Pterineidae
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Actinopteria sp.
Hall 1884
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present | ||||||||||
Cornellites flabella
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present | ||||||||||
Bivalvia
- Modiomorphida
- Modiomorphidae
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Modiomorpha concentrica
(Conrad 1838)
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present | ||||||||||
Gastropoda
- Bellerophontida
- Bucanellidae
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Crenistriella crenistria
(Hall 1876)
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common | ||||||||||
Crinoidea
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Crinoidea indet.
Miller 1821
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abundant | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Pennsylvania |
Coordinates: | 40.3° North, 77.2° West (view map) | ||
Paleocoordinates: | 39.2° South, 25.5° West |
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: | Dromgold | Local bed: | 1 | ||
Local order: | bottom to top | ||||
Stratigraphic resolution: | group of beds |
Lithology and environment
Primary lithology: | gray,green argillaceous,silty "shale" | ||
Secondary lithology: | siltstone | ||
Includes fossils? | Y | ||
Includes fossils? | Y | ||
Lithology description: shale, silty, micaceous, light greenish-gray; siltstone, argillaceous, medium-gray | |||
Environment: | marine indet. | Tectonic setting: | foreland basin |
Taphonomy
Collection methods and comments
Collection methods: | surface (in situ) |
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: | 9704 | ||
Authorizer: | A. Miller | Enterer: | K. Layou | Research group: | marine invertebrate |
Created: | 2001-01-14 11:26:39 | Last modified: | 2001-08-30 17:52:51 |
Access level: | the public | Released: | 2001-01-14 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] |