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

Where: Durham County, North Carolina (35.9° N, 78.9° W: paleocoordinates 7.6° N, 21.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Lithofacies Association II Formation (Chatham Group), Carnian to Carnian (237.0 - 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). Stegomus and Rutiodon from sandstone levels, all other fossils from lake beds.
• "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

Show authors, comments, and common names
Polypodiopsida
  -
Cladophlebis sp.3
Cladophlebis sp.3 Brongniart 1849
 Equisetales - Equisetidae
Neocalamites sp.3, Equisetum sp.1
Neocalamites sp.3 Halle 1908
Equisetum sp.1 Linnaeus 1753 horsetail
Equisetopsida
 Pinidae - Pinidae
Pagiophyllum sp.2
Pagiophyllum sp.2 Heer 1881
Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodontidae indet.1
Hybodontidae indet.1 Agassiz 1834 elasmobranch
Actinopteri
 Semionotiformes - Semionotidae
Semionotus sp.3
Semionotus sp.3 Agassiz 1832
Osteichthyes
 Palaeonisciformes - Redfieldiidae
Cionichthys sp.3
Cionichthys sp.3 Schaeffer 1967
 Palaeonisciformes - Palaeoniscidae
Turseodus spp.3
Turseodus spp.3 Leidy 1857
Amphibia
 Temnospondyli -
Temnospondyli indet.1
 Microsauria -
cf. Pariostegus sp.3
cf. Pariostegus sp.3 Cope 1868 tetrapod
Reptilia
 Phytosauria -
Phytosauria indet.1
 Pseudosuchia -
Suchia indet.2, Rauisuchia indet.1
Suchia indet.2 Krebs 1974 archosaur
Rauisuchia indet.1 Huene 1942 archosaur
Several partial skeletons
 Pseudosuchia - Stagonolepididae
Stegomus sp., Stegomus arcuatus1
Stegomus sp. Marsh 1896 aetosaur
USNM
Stegomus arcuatus1 Marsh 1896 aetosaur
NCSM 11756, partial tail
 Loricata -
Sphenosuchia indet.1, Protosuchia indet.1
Sphenosuchia indet.1 crocodilian
Protosuchia indet.1 crocodilian
Gnathostomata
 Coelacanthini -
Osteopleurus sp.3
Osteopleurus sp.3 Schaeffer 1941
Bivalvia
 Cardiida - Corbiculidae
? Corbiculidae indet.3
? Corbiculidae indet.3 Gray 1847 clam
 Unionida - Unionidae
Unionidae indet.1
Unionidae indet.1 Rafinesque 1820 freshwater mussel
 Myalinida - Myalinidae
Myalinidae indet.2
Myalinidae indet.2 Frech 1891 clam
unclassified
  -
Arthropoda indet.3
Arthropoda indet.3 Latreille 1829
Branchiopoda
 Diplostraca -
Conchostraca indet.1
Conchostraca indet.1 Sars 1867 clam shrimp
 Diplostraca - Limnadiidae
? Palaeolimnadia sp.3
? Palaeolimnadia sp.3 Raymond 1946 clam shrimp
Ostracoda
 Podocopida - Darwinulidae
Darwinulidae indet.1
Darwinulidae indet.1 Brady and Norman 1889 ostracod
Malacostraca
 Decapoda - Cambaridae
Cambaridae indet.1
Cambaridae indet.1 Hobbs 1942 decapod
 Decapoda - Clytiopsidae
cf. Clytiopsis sp.3
cf. Clytiopsis sp.3 Bill 1914 decapod
Insecta
  -
Insecta indet.2
Insecta indet.2 Linnaeus 1758 insect
 Ichnofossils -
? Scoyenia sp.2
? Scoyenia sp.2 White 1929
1Lucas et al. 1998; 2Olsen and Huber 1997; 3Olsen et al. 1989