Boren Clay Products clay pit: Carnian, North Carolina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Clathopteris sp.
Gore 1989
Pekinopteris sp.
Gore 1989
Ischnophyton sp.
Gore 1989
Matridiostrobus sp.
Gore 1989
Cynepteris sp. Ash 1969
Gore 1989
Lonchopteris virginiensis Fontaine 1883
Wingatea sp. Ash 1969
Gore 1989
Polypodiopsida
Cladophlebis microphylla Fontaine 1883
Polypodiopsida - Equisetales - Calamitaceae
Neocalamites virginiensis (Fontaine 1883)
Neocalamites knowltoni Berry 1912
Polypodiopsida - Equisetales - Equisetaceae
Schizoneura virginiensis
Polypodiopsida - Gleicheniales - Matoniaceae
Phlebopteris smithii
Laccopteris smithii
unclassified
Danaeopsis sp. Schimper 1869
Gore 1989
Voltziopsida - Voltziales - Voltziaceae
Voltzia sp. Brongniart 1828
Gore 1989
Bennettitales
Otozamites powelli
Otozamites hespera
Pterophyllum sp. Brongniart 1828
Gore 1989
Zamites powelli Fontaine 1890
Williamsonia sp. Carruthers 1870
Gore 1989
Coniferales - Compsostrobaceae
Compsostrobus sp. Delevoryas and Hope 1973
Gore 1989
Cycadopsida - Cycadales - Nilssoniaceae
Pseudoctenis sp. Seward 1911
Gore 1989
Cycadopsida - Cycadales - Cycadaceae
Leptocycas sp. Delevoryas and Hope 1971
Gore 1989
Ginkgoopsida - Ginkgoales
Eoginkgoites sp. Bock 1952
Gore 1989
Ginkgoopsida - Czekanowskiales
Phoenicopsis sp. Heer 1876
Gore 1989
Cordaitales
Pelourdea sp. Seward 1917
Gore 1989
Reptilia
? Coelurosaurichnus sp. Huene 1941
Gore 1989
Bivalvia - Unionida - Unionidae
Unionidae indet. Rafinesque 1820
Gore 1989
Branchiopoda - Cyzicidae
Cyzicus sp. Audouin 1837
Gore 1989
unclassified
Scoyenia sp. White 1929
Gore 1989
see common names

Geography
Country:United States State/province:North Carolina County:Chatham
Coordinates: 35.5° North, 79.4° West (view map)
Paleocoordinates:0.5° North, 17.6° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Triassic Epoch:Late/Upper Triassic
Stage:Carnian 10 m.y. bin:Triassic 3
*Period:Late/Upper Triassic
Key time interval:Carnian
Age range of interval:237.00000 - 227.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Chatham Formation:Pekin
Stratigraphic resolution:group of beds
Stratigraphy comments: 400 feet above the base of the Triassic, middle part of formation
Lithology and environment
Primary lithology:"cross stratification",red or brown siltstone
Secondary lithology:desiccation cracks,wave ripples mudstone
Includes fossils?Y
Lithology description: "Exposed grayish-red beds slightly to the north of and ?overlying the plant-bearing gray' siltstones consist of a coarsening-upward sequence of wavy-bedded sandstones with mudstone partings. The thickness of the sandstones increase from a few centimeters in the lowest exposed beds to 30-40 em through a stratigraphic distance of about 2 m. The sandstone at top consists of high-angle climbing ripple cross lamination. Claystone-replaced plant compressions occur in the sandstones and on the mudstone partings. Reptile. footprints (Figure 1.5) occur sporadically between ripple-cross laminated beds, and root and burrow (Scoyenia) structures are abundant throughout, although not as densely as in the overlying red mudstones and sandstones. The sandstone layers appear to define larger-scale cross strata or low-angle inclined truncation surfaces."
Environment:fluvial-lacustrine indet.
Geology comments: "The coarsening-upward sequences probably represent small crevasse deltas (showing a wide variety of orientations) that possibly entered small ponds or lakes. The grayish-red coarsening-upward sequence could represent the distal deposit of a large crevasse delta into a swampy lowland. The channel sandstone is a fining-upward sequence with no evidence of epsilon-cross beds (i.e., point bars). This would presumably indicate a braided river environment. However, along with the very large amount of fine-grained sediment present, the absence ofcomplex mid- channel bars (tabular sets or several large cross bed sequences perpendicular to small cross bed sequences), suggests that the sandstone represents an isolated channel fill sequence incised into a wet, swampy, muddy area. ll resembles a distributary channel, but it is not related to a large lake. Anastamosing river channels fill these constraints."
Taphonomy
Modes of preservation:body,adpression,trace
Size of fossils:macrofossils
Preservation of anatomical detail:variable
Collection methods and comments
Collection excludes:some macrofossils,some microfossils
Collection methods:selective quarrying,surface (float),surface (in situ),mechanical,field collection
Reason for describing collection:biostratigraphic analysis
Collection method comments: Used and analysed further in Delevoryas and Hope (1973), Hope and Patterson (1970)
Metadata
Database number:24499
Authorizer:A. Rees, M. Carrano Enterer:D. Sunderlin, M. Carrano
Modifier:M. Carrano Research group:paleobotany
Collections that are a subset of this one:24552, 24554, 24601, 24602
Created:2002-08-08 10:06:15 Last modified:2022-11-04 09:23:48
Access level:the public Released:2002-08-08 10:06:15
Creative Commons license:CC BY
Reference information

Primary reference:
6896.PGAP R. C. Hope and O. F. Patterson III. 1969. Triassic flora from the Deep River Basin, North Carolina. North Carolina Department of Conservation and Development, Division of Mineral Resources Special Publication 2:1-12 [A. Rees/D. Sunderlin/D. Sunderlin]

Secondary references:

83012 P. J. W. Gore. 1989. Stop 1.1: Boren Clay Products Quarry, Gulf, NC. 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 23-25 [M. Carrano/M. Carrano/M. Carrano]