Unit 9, Montebello Member, Mahantango Fm., Marysville, Perry Co., PA: Givetian, Pennsylvania
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Crinoidea
|
||||||||||
|
Crinoidea indet.
Miller 1821
|
||||||||||
| very abundant (columnals at base of unit) | ||||||||||
|
Strophomenata
- Strophomenida
- Leptostrophiidae
|
||||||||||
|
Protoleptostrophia perplana
(Conrad 1839)
|
||||||||||
| abundant | ||||||||||
|
Rhynchonellata
- Spiriferida
- Spiriferidae
|
||||||||||
|
Spirifer sp.
Sowerby 1818
|
||||||||||
| very abundant | ||||||||||
|
Rhynchonellata
- Spiriferida
- Spinocyrtiidae
|
||||||||||
|
Mediospirifer sp.
|
||||||||||
| common | ||||||||||
|
Rhynchonellata
- Tropidoleptidae
|
||||||||||
|
Tropidoleptus carinatus
(Conrad 1839)
|
||||||||||
| common | ||||||||||
|
Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
|
||||||||||
|
Camarotoechia ? congregata
(Conrad 1841)
|
||||||||||
| recombined as Cupularostrum congregata | ||||||||||
| very abundant | ||||||||||
|
Bivalvia
- Ostreida
- Pterineidae
|
||||||||||
|
Glyptodesma ? erectum
|
||||||||||
| present | ||||||||||
|
Anthozoa
- Rugosa
|
||||||||||
|
Rugosa indet.
Milne-Edwards and Haime 1850
|
||||||||||
| 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: | Marysville | Local bed: | unit 9 | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | "cross stratification",gray argillaceous sandstone | ||
| Lithology description: sandstone, fine-grained, medium gray, in 1-2 foot and 4-5 foot crossbeds; sandstone, argillaceous, medium gray, 2-3 inch regular to undulose beds | |||
| 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 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: | 9667 | ||
| 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] |