Graterford tracksite: Norian, Pennsylvania
collected by W. Covington 1993
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Grallatoridae
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Grallator sp.
Hitchcock 1858
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Coelurosaurichnus sp.
Huene 1941
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2 specimens | |||||||||
| SMP VP 161, 171, 186 | ||||||||||
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= Anchisauripus sp.
Lull 1904
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Smith and Klinger 1995 | |||||||||
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= Grallator sp.
Hitchcock 1858
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Lucas and Sullivan 2006 | |||||||||
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Atreipus milfordensis
(Bock 1952)
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45 specimens | |||||||||
| synonym of Grallator tuberosus | ||||||||||
| SMP VP 158-186, 522-523, 531, 536, 541, 544, 547, 551-552, 554, 556-558, 564-565, 567, 757 | ||||||||||
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Reptilia
- Chirotheriidae
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cf. Brachychirotherium sp.
Beurlen 1950
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Lucas and Sullivan 2006 | 1 specimen | ||||||||
| SMP VP 175 | ||||||||||
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Reptilia
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Reptilia indet.
Laurenti 1768
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12 specimens | |||||||||
| Gwyneddichnium or Rhynchosauroides | ||||||||||
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= Rhynchosauroides brunswickii
Ryan and Willard 1947
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Smith and Klinger 1995 | |||||||||
| SMP VP 527-529, 531, 533-535, 537, 548, 549, 566, 568 | ||||||||||
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= Rhynchosauroides sp.
Maidwell 1911
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Lucas and Sullivan 2006 | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Pennsylvania | County: | Montgomery |
| Coordinates: | 40.2° North, 75.4° West (view map) | ||||
| Paleocoordinates: | 14.7° North, 20.4° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Altitude: | 66 meters | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Triassic | Epoch: | Late/Upper Triassic |
| Stage: | Norian | 10 m.y. bin: | Triassic 4 |
| Key time interval: | Norian | ||
| Age range of interval: | 227.00000 - 208.50000 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | desiccation cracks,wave ripples,gray "siliciclastic" |
| Includes fossils? | Y |
| Lithology description: "a few of the footprints are superimposed on preserved mudcracks and ripple marks" | |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | cast,mold/impression,trace |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Preservation of anatomical detail: | good |
| Associated major elements: | some |
| Disassociated major elements: | some |
| Temporal resolution: | snapshot |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | bulk,selective quarrying,mechanical,field collection,observed (not collected) | ||
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | W. Covington | Collection dates: | 1993 |
| Collection method comments: Discovered by Wayne Covington, inmate at the State Correctional Institution at Graterford | |||
Metadata
| Also known as: | SMP locality 164 | ||
| Database number: | 54144 | ||
| Authorizer: | M. Carrano | Enterer: | K. Maguire, M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2005-09-23 12:38:18 | Last modified: | 2023-06-15 11:01:52 |
| Access level: | the public | Released: | 2005-09-23 12:38:18 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 14637. | ETE | R. M. Sullivan, K. Randall, M. Hendricks and W. E. Kochanov. 1994. The Graterford dinosaurs: tracking Triassic travelers. Pennsylvania Geology 25(4):2-9 [M. Carrano/K. Maguire/M. Carrano] |
Secondary references:
| 65944 | S. G. Lucas and R. M. Sullivan. 2006. Tetrapod footprints from the Upper Triassic Passaic Formation near Graterford, Montgomery County, Pennsylvania. In J. D. Harris, S. G. Lucas, J. A. Spielmann, M. G. Lockley, A. R. C. Milner, & J. I. Kirkland (eds.), The Triassic-Jurassic Terrestrial Transition. New Mexico Museum of Natural History and Science Bulletin 37:251-256 [M. Carrano/M. Carrano] | |
| 17036 | ETE | J. B. Smith and K. C. Klinger. 1995. New archosaurian (Reptilia) tracks in the Passaic Formation (Norian) of eastern Pennsylvania. Journal of Vertebrate Paleontology 15(3, suppl.):54A [M. Carrano/M. Carrano] |
| 85047 | D. B. Weishampel and L. Young. 1996. Dinosaurs of the East Coast xiii-275 [M. Carrano/M. Carrano] |