The Cumnock Formation is a Late Triassic-age geologic formation in North Carolina. It is found in the Sanford sub-basin of the Deep River Basin, the southernmost of the large Mesozoic basins forming the Newark Supergroup. It is the middle unit of the Chatham Group, overlying the Pekin Formation and underlying the Sanford Formation. Both of these encompassing formations are primarily red sandstone. The Cumnock Formation, on the other hand, represents a sequence of darker lacustrine (lake) or paludal (swampy/marshy) sediments deposited in a tropical climate.[1] These primarily include shales and coal, with some thin layers of coarser sediment such as siltstone and sandstone.[2][3]
The formation preserves some fossils, including a diverse assemblage of microvertebrates (tiny fragments of vertebrate fossils) from a quarry near Moncure, NC.[2]Palynology and general geological characteristics suggest that the Cumnock Formation is equivalent in age to the Cow Branch Formation of the Dan River/Danville basin on the Virginia-North Carolina border. It has also been compared to the Stockton and Lockatong formations of the Newark Basin in the northeastern United States.[3] Some authors even reduce the Cumnock Formation to a member of the Lockatong Formation, in a broad interpretation of the latter.[4] The Cumnock Formation is probably early Norian in age based on comparisons to similar strata in the eastern United States, as well as early sections of the Chinle Formation further west.[1][2]
^ abWhiteside, Jessica H.; Grogan, Danielle S.; Olsen, Paul E.; Kent, Dennis V. (2011-05-31). "Climatically driven biogeographic provinces of Late Triassic tropical Pangea". Proceedings of the National Academy of Sciences. 108 (22): 8972–8977. doi:10.1073/pnas.1102473108. ISSN 0027-8424. PMC3107300. PMID 21571639.
^ abcHeckert, Andrew B.; Mitchell, Jonathan S.; Schneider, Vincent P.; Olsen, Paul E. (2012-03-01). "Diverse New Microvertebrate Assemblage from the Upper Triassic Cumnock Formation, Sanford Subbasin, North Carolina, USA". Journal of Paleontology. 86 (2): 368–390. doi:10.1666/11-098.1. ISSN 0022-3360. S2CID 18239160.
^ abLitwin, Ronald J.; Ash, Sidney R. (1993-05-03). "Revision of the biostratigraphy of the Chatham Group (Upper Triassic), Deep River basin, North Carolina, USA". Review of Palaeobotany and Palynology. 77 (1): 75–95. doi:10.1016/0034-6667(93)90057-2. ISSN 0034-6667.
^Weems, Robert E.; Tanner, Lawrence H.; Lucas, Spencer G. (2016). "Synthesis and revision of the lithostratigraphic groups and formations in the Upper Permian?–Lower Jurassic Newark Supergroup of eastern North America". Stratigraphy. 13 (2).
Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
This article about a specific stratigraphicformation in North Carolina is a stub. You can help Wikipedia by expanding it.
cumnock, formation, late, triassic, geologic, formation, north, carolina, found, sanford, basin, deep, river, basin, southernmost, large, mesozoic, basins, forming, newark, supergroup, middle, unit, chatham, group, overlying, pekin, formation, underlying, sanf. The Cumnock Formation is a Late Triassic age geologic formation in North Carolina It is found in the Sanford sub basin of the Deep River Basin the southernmost of the large Mesozoic basins forming the Newark Supergroup It is the middle unit of the Chatham Group overlying the Pekin Formation and underlying the Sanford Formation Both of these encompassing formations are primarily red sandstone The Cumnock Formation on the other hand represents a sequence of darker lacustrine lake or paludal swampy marshy sediments deposited in a tropical climate 1 These primarily include shales and coal with some thin layers of coarser sediment such as siltstone and sandstone 2 3 Cumnock FormationStratigraphic range Late Triassic early NorianTypeFormationUnit ofChatham GroupUnderliesSanford FormationOverliesPekin FormationLithologyPrimaryshaleOthercoal sandstone siltstoneLocationRegionNorth CarolinaCountryUnited States The formation preserves some fossils including a diverse assemblage of microvertebrates tiny fragments of vertebrate fossils from a quarry near Moncure NC 2 Palynology and general geological characteristics suggest that the Cumnock Formation is equivalent in age to the Cow Branch Formation of the Dan River Danville basin on the Virginia North Carolina border It has also been compared to the Stockton and Lockatong formations of the Newark Basin in the northeastern United States 3 Some authors even reduce the Cumnock Formation to a member of the Lockatong Formation in a broad interpretation of the latter 4 The Cumnock Formation is probably early Norian in age based on comparisons to similar strata in the eastern United States as well as early sections of the Chinle Formation further west 1 2 See also edit nbsp Paleontology portal List of fossiliferous stratigraphic units in North CarolinaReferences edit a b Whiteside Jessica H Grogan Danielle S Olsen Paul E Kent Dennis V 2011 05 31 Climatically driven biogeographic provinces of Late Triassic tropical Pangea Proceedings of the National Academy of Sciences 108 22 8972 8977 doi 10 1073 pnas 1102473108 ISSN 0027 8424 PMC 3107300 PMID 21571639 a b c Heckert Andrew B Mitchell Jonathan S Schneider Vincent P Olsen Paul E 2012 03 01 Diverse New Microvertebrate Assemblage from the Upper Triassic Cumnock Formation Sanford Subbasin North Carolina USA Journal of Paleontology 86 2 368 390 doi 10 1666 11 098 1 ISSN 0022 3360 S2CID 18239160 a b Litwin Ronald J Ash Sidney R 1993 05 03 Revision of the biostratigraphy of the Chatham Group Upper Triassic Deep River basin North Carolina USA Review of Palaeobotany and Palynology 77 1 75 95 doi 10 1016 0034 6667 93 90057 2 ISSN 0034 6667 Weems Robert E Tanner Lawrence H Lucas Spencer G 2016 Synthesis and revision of the lithostratigraphic groups and formations in the Upper Permian Lower Jurassic Newark Supergroup of eastern North America Stratigraphy 13 2 Various Contributors to the Paleobiology Database Fossilworks Gateway to the Paleobiology Database Retrieved 17 December 2021 nbsp This article about a specific stratigraphic formation in North Carolina is a stub You can help Wikipedia by expanding it vte nbsp This article related to the Triassic period is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Cumnock Formation amp oldid 1206174669, wikipedia, wiki, book, books, library,
