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TitleAn integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes and geochronology) for the Permian-Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China
AuthorLehrmann, D J; Stepchinski, L; Altiner, D; Orchard, M JORCID logo; Montgomery, P; Enos, P; Ellwood, B B; Bowring, S A; RAmezani, J; Wang, H; Wei, J; Yu, M; Griffiths, J D; Minzoni, M; Schaal, E K; Li, X; Meyer, K
SourceJournal of Asian Earth Sciences vol. 108, 2015 p. 117-135, Open Access logo Open Access
Alt SeriesEarth Sciences Sector, Contribution Series 20150072
PublisherElsevier BV
Mediapaper; on-line; digital
File formatpdf
AreaNanpangjiang Basin; Yangtze Platform; China
Lat/Long WENS 101.0000 109.0000 30.0000 22.0000
Subjectsgeochronology; paleontology; extinctions, biotic; biostratigraphy; conodonts; fossils; carbon isotopes; paleomagnetism; magnetostratigraphy; microfossils; magnetic susceptibility; marine organisms; Permian-Triassic Extinction
Illustrationslocation maps; satellite images; cross-sections, stratigraphic; stratigraphic columns; graphs; paleontological drawings; photographs; photomicrographs; tables
ProgramGSC Pacific Division
Released2015 08 01
AbstractThe chronostratigraphy of Guandao section has served as the foundation for numerous studies of the end-Permian extinction and biotic recovery in south China. Guandao section is continuous from the Permian-Triassic boundary to the Upper Triassic. Conodonts enable broad delineation of stage and substage boundaries and calibration of foraminifer biostratigraphy as follows. Changhsingian-Griesbachian: first Hindeodus parvus, and first appearance of foraminifers Postcladella kalhori and Earlandia sp. Griesbachian-Dienerian: first Neospathodus dieneri, and last appearance of foraminifer P. grandis. Dienerian-Smithian: first Novispathodus waageni and late Dienerian first appearance of foraminifer Hoyenella ex gr. sinensis. Smithian-Spathian: first Nv? crassatus and last appearance of foraminifers Arenovidalina n. sp. and Glomospirella cf. vulgaris. Spathian-Aegean: first Chiosella timorensis and first appearance of foraminifer Meandrospira dinarica. Aegean-Bithynian: first Nicoraella germanica and first appearance of foraminifer Pilammina densa. Bithynian-Pelsonian: after last Neogondolella regalis, prior to first Paragondolella bulgarica and first appearance of foraminifer Aulotortus eotriasicus. Pelsonian-Illyrian: first Pg. excelsa and last appearance of foraminifers Meandrospira? deformata and Pilamminella grandis. Illyrian-Fassanian: first Budurovignathus truempyi, and first appearance of foraminifers Abriolina mediterranea and Paleolituonella meridionalis. Fassanian- Longobardian: first Bv. mungoensis and last appearance of foraminifer A. mediterranea. Longobardian-C ordevolian: first Quadralella polygnathiformis and last appearance of foraminifers Turriglomina mesotriasica and Endotriadella wirzi.
Summary(Plain Language Summary, not published)
The Guandao section in south China displays a continuous rock-record for much of Triassic time and contains abundant conodont and foraminifer fossils, a primary rock-magnetic signature, globally recognized carbon-isotope excursions, and several radiometrically dated volcanic ash horizons. Conodont analysis enables broad delineation of stages, substages, and numerous biozones from the Late Permian through the Late Triassic. Integration of paleontological, physical, and chemical data sets provide a global standard for time scale studies.

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