Nyack Beach State Park tracksite (Triassic of the United States)

Also known as Haverstraw

Where: Rockland County, New York (41.1° N, 73.9° W: paleocoordinates 15.8° N, 19.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Stockton Formation (Chatham Group), Norian (228.0 - 208.5 Ma)

• orig. assigned to Brunswick Fm.

• bed-level stratigraphic resolution

Environment/lithology: fluvial; red, blue, silty mudstone and argillaceous sandstone

• "purplish-red silty mudstone and argullaceous sandstone"

Size classes: macrofossils, mesofossils

Preservation: mold/impression, trace

Collected by P. Olsen & R. Salvia in 1972, 1976; reposited in the YPM

Collection methods: quarrying, surface (in situ), mechanical,

Primary reference: D. W. Fisher. 1981. The world of Coelophysis—a New York dinosaur of 200 million years ago. New York State Museum and Science Service Circular 49:1-22 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 57917: authorized by Matthew Carrano, entered by Kaitlin Maguire on 06.01.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Phytosauria -
Phytosauria indet.
 Phytosauria - Parasuchidae
Apatopus lineatus
Apatopus lineatus Bock 1952 archosaur
YPM 7731.A, 8263
 Pseudosuchia - Chirotheriidae
Chirotherium lulli, ? Brachychirotherium sp., Brachychirotherium eyermani
Chirotherium lulli Bock 1952 archosaur
YPM 8262
? Brachychirotherium sp. Beurlen 1950 archosaur
Brachychirotherium eyermani Baird 1957 archosaur
YPM 7731.B
 Theropoda - Grallatoridae
? Atreipus sp., Grallator sp.
? Atreipus sp. Olsen and Baird 1986 theropod
YPM 7731
Grallator sp. Hitchcock 1858 theropod
NYSM
 Squamata -
Rhynchosauroides cf. hyperbates
Rhynchosauroides cf. hyperbates Baird 1957 squamates