tracksite below Smith's Ferry, Northampton: Hettangian - Sinemurian, Massachusetts
collected 1840-1855

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Chalthropteris sp.
Hitchcock 1865 4 specimens
Reptilia - Grallatoridae
Brontozoum exsertum Hitchcock 1858
Hitchcock 1865 14 specimens
synonym of Grallator tuberosus
Brontozoum validum Hitchcock 1858
Hitchcock 1865 7 specimens
synonym of Grallator tuberosus
Grallator cuneatus Hitchcock 1858
Hitchcock 1865 5 specimens
synonym of Grallator tenuis
Grallator formosus Hitchcock 1858
Hitchcock 1865 1 specimen
synonym of Grallator tenuis
Brontozoum giganteum (Hitchcock 1836)
Hitchcock 1865 9 specimens
recombined as Eubrontes giganteus
Brontozoum approximatum Hitchcock 1865
Hitchcock 1865 2 specimens
synonym of Eubrontes giganteus
Brontozoum divaricatum Hitchcock 1865
Hitchcock 1865 3 specimens
synonym of Eubrontes giganteus
Brontozoum ? sillimaniium
Hitchcock 1865 2 specimens
synonym of Eubrontes
Brontozoum minusculum (Hitchcock 1837)
Hitchcock 1865 2 specimens
recombined as Eubrontes minusculus
Reptilia
Platypterna varica Hitchcock 1858
Hitchcock 1865 1 specimen
synonym of Platypterna concamerata
Palamopus dananus Hitchcock 1848
recombined as Polemarchus dananus
Tridentipes insignis Hitchcock 1858
Hitchcock 1865 2 specimens
synonym of Steropoides divaricatus
see common names

Geography
Country:United States State/province:Massachusetts County:Hampshire
Coordinates: 42.2° North, 72.6° West (view map)
Paleocoordinates:23.9° North, 18.7° West
Basis of coordinate:estimated from map
Altitude:43 meters
Geographic resolution:outcrop
Time
Period:Jurassic Epoch:Early/Lower Jurassic
10 m.y. bin:Jurassic 1
Key time interval:Hettangian - Sinemurian
Age range of interval:201.40000 - 192.90000 m.y. ago
Stratigraphy
Geological group:Agawam Formation:Portland
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology:micaceous,gray lithified sandstone
Includes fossils?Y
Lithology description: hard, gray micaceous sandstone
Environment:terrestrial indet.
Taphonomy
Modes of preservation:cast,mold/impression,trace
Degree of concentration:concentrated
Size of fossils:macrofossils
Spatial orientation:life position
Preservation of anatomical detail:good
Associated major elements:many
Disassociated major elements:some
Temporal resolution:snapshot
Spatial resolution:autochthonous
Collection methods and comments
Collection methods:surface (in situ),mechanical,field collection,observed (not collected)
Reason for describing collection:general faunal/floral analysis
Collection dates:1840-1855
Metadata
Also known as:Lull 20
Database number:62844
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2006-07-28 08:37:46 Last modified:2023-01-06 11:40:17
Access level:the public Released:2006-07-28 08:37:46
Creative Commons license:CC BY
Reference information

Primary reference:
30909. E. Hitchcock. 1848. An attempt to discriminate and describe the animals that made the fossil footmarks of the United States, and especially of New England. Memoirs of the American Academy of Arts and Sciences, new series 3:129-256 [M. Carrano/M. Carrano]

Secondary references:

83584 H. Haubold. 1974. Die Fossilen Saurierfährten [Fossil Reptile Tracks] 1-168 [M. Carrano/M. Carrano]
30862ETE C. H. Hitchcock. 1865. Appendix [B]. Descriptive catalogue of the specimens in the Hitchcock Ichnological Cabinet of Amherst College. In C. H. Hitchcock (ed.), Supplement to the Ichnology of New England. A Report to the Government of Massachusetts in 1863 43-96 [M. Carrano/M. Carrano/M. Carrano]
30860ETE E. Hitchcock. 1865. Supplement to the ichnology of New England. In C. H. Hitchcock (ed.), Supplement to the Ichnology of New England. A Report to the Government of Massachusetts in 1863 1-37 [M. Carrano/M. Carrano/M. Carrano]