Unit 9, Montebello Member, Mahantango Fm., Rockville, Perry Co., PA: Givetian, Pennsylvania
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Phacopida
- Homalonotidae
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Trimerus dekayi
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| common | ||||||||||
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Bivalvia
- Nuculanida
- Malletiidae
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Palaeoneilo muta
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| common [entered as Paleoneilo muta] | ||||||||||
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Bivalvia
- Ostreida
- Pterineidae
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Actinopteria decussata
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| common | ||||||||||
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Leptodesma sp.
Hall 1883
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| present | ||||||||||
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Cornellites flabella
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| common | ||||||||||
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Tentaculitida
- Tentaculitidae
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Tentaculites attenuatus
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| present | ||||||||||
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Rhynchonellata
- Spiriferida
- Spinocyrtiidae
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Mediospirifer ? audaculus
(Conrad 1842)
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| abundant | ||||||||||
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Rhynchonellata
- Spiriferida
- Cyrtinopsidae
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Delthyris sculptilis
Hall 1843
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| recombined as Megakozlowskiella sculptilis | ||||||||||
| present | ||||||||||
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Rhynchonellata
- Tropidoleptidae
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Tropidoleptus carinatus
(Conrad 1839)
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| present | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Camarotoechia congregata
(Conrad 1841)
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| recombined as Cupularostrum congregata | ||||||||||
| abundant | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Camarotoechiidae
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Camarotoechia prolifica
Hall 1867
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| common | ||||||||||
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Strophomenata
- Orthotetida
- Schuchertellidae
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Schuchertella variabilis
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| common | ||||||||||
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Strophomenata
- Strophomenida
- Leptostrophiidae
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Protoleptostrophia perplana
(Conrad 1839)
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| common | ||||||||||
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Strophomenata
- Strophomenida
- Chonetidae
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Devonochonetes coronatus
(Hall 1857)
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| abundant | ||||||||||
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Devonochonetes scitulus
(Hall 1857)
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| abundant | ||||||||||
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unclassified
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Bryozoa indet.
Ehrenberg 1831
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| present | ||||||||||
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Stenolaemata
- Cryptostomata
- Fenestellidae
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Fenestella emaciata
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| common | ||||||||||
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Stenolaemata
- Cystoporida
- Sulcoreteporidae
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Sulcoretepora incisurata
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| very abundant | ||||||||||
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Anthozoa
- Favositida
- Micheliniidae
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Pleurodictyum styloporum
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| common | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Pennsylvania | County: | Perry |
| Coordinates: | 40.3° North, 76.9° West (view map) | ||||
| Paleocoordinates: | 39.3° South, 25.3° 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: | Montebello |
| Local section: | Rockville | Local bed: | unit 9 | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | gray sandstone | ||
| Secondary lithology: | siltstone | ||
| Lithology description: sandstone, fine grained, light olive gray in 2-3 ft. undulose beds; siltstone, medium dark gray, weathering olive gray | |||
| Environment: | transition zone/lower shoreface | 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 information: present (one 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: | 9661 | ||
| Authorizer: | A. Miller | Enterer: | K. Layou | Research group: | marine invertebrate |
| Created: | 2001-01-10 12:01:00 | Last modified: | 2001-08-30 17:52:51 |
| Access level: | the public | Released: | 2001-01-10 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] |