Triangle Brick Quarry, Genlee (Triassic of the United States)

Where: Durham County, North Carolina (35.9° N, 78.9° W: paleocoordinates 10.2° N, 22.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Lithofacies Association II Formation (Newark Group), Norian (228.0 - 208.5 Ma)

• "Lithofacies Association II of Hoffman & Gallacher. The relationship of these strata to the better known sequence in the Sanford sub-basin is still poorly resolved." Durham subbasin. Suggested presence of Aetosaurus used to support a Norian age.

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; massive, bioturbated, red mudstone and gray, red sandstone

• Quarry contains deposits interpreted as lacustrine and fluvial (including channel and crevasse splay)
• "The main quarry exposes about 60 m of red, purple, and grey, fissile to bioturbated massive mudstones interbedded with gray, brown, and red arkosic sandstones. The upper half of the sequence consists of fissile red to gray-green fissile mudstones interbedded with bioturbated massive mudstone and arkosic sandstones arranged in a pattern reminiscent of cyclical lacustrine sequences in other Newark Supergroup basins. At the scale of the outcrop, at least, each fissile mudstone bed is laterally persistent with little lithological change. The lowest fissile mudstone is particularly fine-grained and well laminated and contains a rich invertebrate assemblage. The lower half of the exposed sequence consists of red to purple bioturbated massive mudstone with lenticular arkosic sandstones and several caliche-bearing horizons with occasional articulated to fragmentary reptile skeletons."

Size classes: macrofossils, mesofossils

Preservation: mold/impression, trace

Collected in 1965-; reposited in the USNM

Collection methods: quarrying,

• first discovery in 1965 by quarry workman and deposited in USNM; Late finds in NCSM: North Carolina State Museum, Raleigh

Primary reference: J. M. Parker. 1966. Triassic reptilian fossil from Wake Count, North Carolina. The Journal of the Elisha Mitchell Scientific Society 82(2):92 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 89149: authorized by Richard Butler, entered by Richard Butler on 07.05.2009, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Insecta
 Dicondylia -
Coleoptera indet.2 Linnaeus 1758 beetle
Branchiopoda
 Diplostraca - Cyzicidae
Cyzicus sp.2 Audouin 1837 clam shrimp
 Limnadioidea - Limnadiidae
? Palaeolimnadia sp.2 Raymond 1946 branchiopod
Malacostraca
 Decapoda - Cambaridae
Cambaridae indet.1 Hobbs 1942 decapod
Ostracoda
  -
Darwinula spp.2 Brady and Robertson 1885 ostracod
Bivalvia
 Myalinida - Myalinidae
Myalinidae indet.2 Frech 1891 clam
 Unionida - Unionidae
Unionidae indet.1 Rafinesque 1820 freshwater mussel
Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodontidae indet.1 Agassiz 1843 elasmobranch
Osteichthyes
 Coelacanthini -
Osteopleurus sp.1 Schaeffer 1941 bony fish
Actinopteri
 Palaeonisciformes - Palaeoniscidae
Turseodus spp.1 Leidy 1857
 Palaeonisciformes - Redfieldiidae
Cionichthys sp.1 Schaeffer 1967
 Semionotiformes - Semionotidae
Semionotus sp.1 Agassiz 1843
Osteichthyes
 Temnospondyli -
Reptilia
 Pseudosuchia -
Suchia indet.2 Krebs 1974 archosaur
 Pseudosuchia - Stagonolepididae
Stegomus sp. Marsh 1896 archosaur
USNM
Stegomus arcuatus1 Marsh 1896 archosaur
NCSM 11756, partial tail
 Loricata -
Protosuchia indet.1 Mook 1934 crocodilian
Sphenosuchia indet.1 crocodilian
 Pseudosuchia -
Rauisuchia indet.1 Huene 1942 archosaur
Several partial skeletons
 Phytosauria -
Osteichthyes
 Microsauria -
cf. Pariostegus sp.2 Cope 1868 tetrapod
Pinopsida
 Pinales - Araucariaceae
Pagiophyllum sp.2 Heer 1881
Equisetopsida
 Equisetales - Equisetaceae
Equisetum sp.1 Linnaeus
Pteridopsida
  -
Cladophlebis sp.2 Brongniart 1849
Calamitaceae
  - Calamitaceae
Neocalamites sp.2 Halle 1908
 Ichnofossils -
? Scoyenia sp.2 White 1929