NJ-29 exposures (Triassic of the United States)

Also known as Byram

Where: Hunterdon County, New Jersey (40.4° N, 75.1° W: paleocoordinates 15.0° N, 20.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• middle of formation

• bed-level stratigraphic resolution

Environment/lithology: lacustrine - small; calcareous claystone and poorly lithified, gray siltstone

• "microlaminated calcareous claystone consisting of carbonate-rich and carbonate-poor couplets"

•"gray decimeter-scale siltstone and fine sandstone beds with abundant contorted desiccation cracks, soft sediment deformation"

Size classes: macrofossils, mesofossils

Preservation: trace

Primary reference: P. E. Olsen. 1989. Stop 5.7: Middle Lockatong Formation at Byram, NJ. In P. E. Olsen, R. W. Schlische, & P. J. W. Gore (eds.), Tectonic, Depositional, and Paleoecological History of Early Mesozoic Rift Basins, Eastern North America. Gulf, North Carolina, USA to Parrsboro, Nova Scotia, Canada. July 20–30, 1989. International Geological Congress Field Trip T-351 86-89 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 227832: authorized by Matthew Carrano, entered by Matthew Carrano on 04.11.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Diapsida - Tanystropheidae
Tanytrachelos sp.
Tanytrachelos sp. Olsen 1979 archosauromorph
 Phytosauria - Parasuchidae
? Apatopus sp.
? Apatopus sp. Baird 1957 archosaur
Coelacanthimorpha
 Coelacanthiformes - Dipluridae
Diplurus sp.
Diplurus sp. Newberry 1878 coelacanth
Osteichthyes
 Palaeonisciformes - Palaeoniscidae
Turseodus sp.
Turseodus sp. Leidy 1857
 Palaeonisciformes - Redfieldiidae
? Synorichthys sp.
? Synorichthys sp. Schaeffer 1967
Ostracoda
 Podocopida - Darwinulidae
Darwinula spp.
Darwinula spp. Brady and Robertson 1885 ostracod
Branchiopoda
 Diplostraca -
Conchostraca indet.
Conchostraca indet. Sars 1867 clam shrimp
 Diplostraca - Cyzicidae
Cyzicus sp.
Cyzicus sp. Audouin 1837 clam shrimp
 Diplostraca - Limnadiidae
Palaeolimnadia sp.
Palaeolimnadia sp. Raymond 1946 clam shrimp