Mount Tom, "Ostrom Bed" (Jurassic of the United States)

Where: Hampden County, Massachusetts (42.2° N, 72.6° W: paleocoordinates 22.9° N, 19.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: East Berlin Formation (Meriden Group), Hettangian (201.3 - 199.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; fine-grained, micaceous, brown, gray sandstone and sandstone

• "flaggy, micaceous, fine-grained, arkosic sandstone of brown to gray color on fresh surfaces. Ripple marks occur at several levels, but none are preserved on the ex- posed track-bearing surface."

Size class: macrofossils

Preservation: mold/impression, trace

Collected by J. Ostrom in 1938, 1972

Collection methods: surface (in situ),

Primary reference: Anonymous. 1938. Help needed to conserve dinosaur tracks. Nature Magazine 31(9):546 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 187029: authorized by Matthew Carrano, entered by Matthew Carrano on 11.07.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Saurischia - Eubrontidae
"Eubrontes sp." = Grallator (Eubrontes), "Grallator sp." = Grallator (Eubrontes), "Anchisauripus sp." = Grallator (Eubrontes), "? Anchisauripus sp." = Grallator (Eubrontes)
"Eubrontes sp." = Grallator (Eubrontes) Hitchcock 1845 theropod
"Grallator sp." = Grallator (Eubrontes) Hitchcock 1845 theropod
"Anchisauripus sp." = Grallator (Eubrontes) Hitchcock 1845 theropod
"? Anchisauripus sp." = Grallator (Eubrontes) Hitchcock 1845 theropod