Messrs. Clark Quarry, Milford (level A): Norian, New Jersey
collected by S. Clark, J. Eyerman 1885-1887

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Grallatoridae
aff. Anomoepus major Hitchcock 1858
46 specimens
    = Brontozoum isodactylum Hitchcock 1858
Eyerman 1889
    = Grallator sp. Hitchcock 1858
Bock 1952
    = Grallator sulcatus n. sp. Baird 1957
Baird 1957
synonym of Grallator cursorius
MCZ 215–228
Grallator parallelus (Hitchcock 1837)
Hitchcock 1889
    = Grallator sulcatus Baird 1957
Baird 1957
synonym of Grallator cursorius
Grallator cuneatus Hitchcock 1858
Eyerman 1889
    = Grallator sulcatus Baird 1957
Baird 1957
synonym of Grallator cursorius
see common names

Geography
Country:United States State/province:New Jersey County:Hunterdon
Coordinates: 40.6° North, 75.1° West (view map)
Paleocoordinates:15.1° North, 20.1° West
Basis of coordinate:based on nearby landmark
Altitude:300 feet
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
Geological group:Chatham Formation:Passaic Member:Perkasie
Stratigraphic resolution:group of beds
Stratigraphy comments: Unit O. Upper part of formation, equivalent to Middle Keuper; about 5100 m above base of Triassic
Lithology and environment
Primary lithology:desiccation cracks,gray "shale"
Secondary lithology:desiccation cracks,gray sandstone
Includes fossils?Y
Includes fossils?Y
Lithology description: "the footprints were impressed in gray shale and are preserved as natural casts on the under surface of a gray sandstone 4 to 6 cm. thick...narrow shrinkage cracks"
Environment:terrestrial indet.
Taphonomy
Modes of preservation:cast,mold/impression,trace
Size of fossils:macrofossils
Spatial orientation:life position
Preservation of anatomical detail:medium
Associated major elements:some
Disassociated major elements:some
Temporal resolution:time-averaged
Spatial resolution:autochthonous
Collection methods and comments
Collection methods:selective quarrying,surface (in situ),field collection,survey of museum collection
Reason for describing collection:general faunal/floral analysis
Museum repositories:MCZ
Collectors:S. Clark, J. Eyerman Collection dates:1885-1887
Collection method comments: collected by John Eyerman
Metadata
Database number:46621
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2005-01-21 08:13:24 Last modified:2015-07-29 15:56:38
Access level:the public Released:2005-01-21 08:13:24
Creative Commons license:CC BY
Reference information

Primary reference:
55948. J. Eyerman. 1886. Footprints on the Triassic sandstone (Jura-Trias) of New Jersey. The American Journal of Science, series 3 31(181):72 [M. Carrano/M. Carrano]

Secondary references:

12444ETE D. Baird. 1957. Triassic reptile footprint faunules from Milford, New Jersey. Bulletin of the Museum of Comparative Zoology 117(5):449-520 [M. Carrano/M. Carrano/M. Carrano]
19814ETE W. Bock. 1952. Triassic reptilian tracks and trends of locomotive evolution. Journal of Paleontology 26(3):395-433 [M. Carrano/M. Carrano/M. Carrano]
55949 J. Eyerman. 1889. Fossil foot-prints from the Jura (?)-Trias of New Jersey. Proceedings of the Academy of Natural Sciences of Philadelphia 41:32-33 [M. Carrano/M. Carrano]
30910ETE C. H. Hitchcock. 1889. Recent progress in ichnology. Proceedings of the Boston Society of Natural History 24(8):117-127 [M. Carrano/M. Carrano/M. Carrano]
14907ETE P. E. Olsen and D. Baird. 1986. The ichnogenus Atreipus and its significance for Triassic biostratigraphy. In: K. Padian (ed.), The Beginning of the Age of Dinosaurs: Faunal Changes Across the Triassic-Jurassic Boundary. Cambridge University Press, Cambridge 61-87 [M. Carrano/K. Maguire/M. Carrano]