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Guniutan Formation

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The δ13C curve through the Darriwilian Guniutan Formation at the Maocaopu section, Hunan Province, southern China. Conodont biostratigraphy is after Zhang (1998b). It should be noted that the 0 m level and lowest sample level correspond to the 4.7 m level in the section of Zhang (1998b); also that her Dzikodus tablepointensis Zone corresponds exactly to the Baltoscandian Eoplacognathuspseudoplanus Zone. As shown in the diagram, there is a gradual increase in δ13C values in the lower half of the Microzarkodina ozarkodella Subzone that marks the beginning of the MDICE, the peak values of which are in the upper half of this subzone. The MDICE is cut off by the unconformity at the top of the Guniutan Formation (shown by a wavy line), where there is a significant stratigraphic gap corresponding to the Eoplacognathus suecicus and Pygodus serra zones. The close similarity between this curve and that of the Hällekis Quarry in terms of curve shape and peak δ13C values should be noted. The δ13C values through the collected interval in the lower part of the Datianba Formation are relatively uniform and are interpreted as being post-MDICE.

The δ 13 C curve through the Darriwilian Guniutan Formation at the Maocaopu... Available to Purchase

Published: 01 March 2010
Fig. 5. The δ 13 C curve through the Darriwilian Guniutan Formation at the Maocaopu section, Hunan Province, southern China. Conodont biostratigraphy is after Zhang (1998 b ). It should be noted that the 0 m level and lowest sample level correspond to the 4.7 m level in the section of Zhang
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The δ13C curve through the Darriwilian Guniutan Formation at the Puxi River section near Fenxiang, Hubei Province, southern China. Lithology and conodont biostratigraphy are after Schmitz et al. (2008). The δ13C baseline values between c. +0.5‰ and +1‰ through the Yangtzeplacognathus crassus Zone and lower Microzarkodina hagetiana Subzone are similar to those in the coeval interval in the Maocaopu succession, as is also the appearance of the gradually elevated δ13C values of the MDICE in the uppermost Microzarkodina hagetiana and the Microzarkodina ozarkodella subzones. The abnormal negative δ13C values in the uppermost Guniutan Formation may reflect the influx of meteoric water at unconformities.

The δ 13 C curve through the Darriwilian Guniutan Formation at the Puxi Riv... Available to Purchase

Published: 01 March 2010
Fig. 6. The δ 13 C curve through the Darriwilian Guniutan Formation at the Puxi River section near Fenxiang, Hubei Province, southern China. Lithology and conodont biostratigraphy are after Schmitz et al . (2008 ). The δ 13 C baseline values between c . +0.5‰ and +1‰ through
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The middle Darriwilian (Ordovician) δ 13 C excursion (MDICE) discovered in the Yangtze Platform succession in China: implications of its first recorded occurrences outside Baltoscandia Available to Purchase

Birger Schmitz, Stig M. Bergström, Wang Xiaofeng
Published: 01 March 2010
Journal of the Geological Society (2010) 167 (2): 249–259.
DOI: https://doi.org/10.1144/0016-76492009-080
...Fig. 5. The δ 13 C curve through the Darriwilian Guniutan Formation at the Maocaopu section, Hunan Province, southern China. Conodont biostratigraphy is after Zhang (1998 b ). It should be noted that the 0 m level and lowest sample level correspond to the 4.7 m level in the section of Zhang...
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View PDF for article title, The middle Darriwilian (Ordovician) δ 13 C excursion (MDICE) discovered in the Yangtze Platform succession in China: implications of its first recorded occurrences outside Baltoscandia
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Stratigrapic summary diagram illustrating the biostratigraphy, lithostratigraphy, vertical range of formations, and the presence of stratigraphic gaps (vertical ruling) in the study successions. The apparent stratigraphical completeness of the Mehikoorma (421) section compared with the other successions should be noted. A comparison between the Puxi and Maocaopu sections clearly indicates that the base of the Guniutan Formation is diachronous across the Yangtze Platform, as has previously been suggested by Chen et al. (1995).

Stratigrapic summary diagram illustrating the biostratigraphy, lithostratig... Available to Purchase

Published: 01 March 2010
with the other successions should be noted. A comparison between the Puxi and Maocaopu sections clearly indicates that the base of the Guniutan Formation is diachronous across the Yangtze Platform, as has previously been suggested by Chen et al . (1995 ).
Journal Article

Early–Middle Ordovician brachiopod diversification in the middle Yangtze region of South China Available to Purchase

Zhenyu Song, Yunpeng Xiao, Chuantao Xiao
Published: 19 February 2020
Canadian Journal of Earth Sciences (2020) 57 (8): 999–1009.
DOI: https://doi.org/10.1139/cjes-2019-0141
... to conduct fieldwork. The Lower Ordovician strata, from the bottom up, include the Nanjinguan Formation, the Fenxiang Formation, and the Honghuayuan Formation, and the Middle Ordovician strata include the Dawan Formation and the Guniutan Formation. The Early–Middle Ordovician conodont species in this region...
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ELEMENT ASSOCIATION AND MORPHOLOGY IN SOME MIDDLE ORDOVICIAN PLATFORM-EQUIPPED CONODONTS Available to Purchase

ANITA LÖFGREN, ZHANG JIANHUA
Published: 01 July 2003
Journal of Paleontology (2003) 77 (4): 721–737.
DOI: https://doi.org/10.1666/0022-3360(2003)077<0721:EAAMIS>2.0.CO;2
... and Bergström, 1999 ). The thickness of intervals bearing Y. crassus varies between 0.5 and 4 metres in Baltoscandia. In the central Yangtze platform Y. crassus occurs in the upper part of the Guniutan Formation, and in the southern Yangtze platform it occurs in the lower part of the Guniutan Formation...
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View PDF for article title, ELEMENT ASSOCIATION AND MORPHOLOGY IN SOME MIDDLE ORDOVICIAN PLATFORM-EQUIPPED CONODONTS
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Conodont biostratigraphy of the Crawford Group, Southern Uplands, Scotland Available to Purchase

Howard A. Armstrong, James D. Floyd, Lu Tingqing, Hugh F. Barron
Published: 01 December 2002
Scottish Journal of Geology (2002) 38 (2): 69–82.
DOI: https://doi.org/10.1144/sjg38020069
... Cambrian and Lower Ordovician of Northwestern Öland, southeastern Sweden . Utrecht Micropaleontolgical Bulletin , 10 , 1 – 126 . ZHANG , JIANHUAN . 1998 . Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China . Acta universitatis...
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View PDF for article title, Conodont biostratigraphy of the Crawford Group, Southern Uplands, Scotland
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First documentation of the Ordovician Guttenberg δ 13 C excursion (GICE) in Asia: chemostratigraphy of the Pagoda and Yanwashan formations in southeastern China Available to Purchase

STIG M. BERGSTRÖM, CHEN XU, BIRGER SCHMITZ, SETH YOUNG, RONG JIA-YU, MATTHEW R. SALTZMAN
Published: 05 November 2008
Geological Magazine (2009) 146 (1): 1–11.
DOI: https://doi.org/10.1017/S0016756808005748
... . Ordovician-Early Silurian (Llandovery) Stratigraphy and Palaeontology of the Upper Yangtze Platform , South China . Beijing : Science Press , 169 pp. Zhang Jian-Hua . 1998 . Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China . Stockholm...
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View PDF for article title, First documentation of the Ordovician Guttenberg δ 13 C excursion (GICE) in Asia: chemostratigraphy of the Pagoda and Yanwashan <span class="search-highlight">formations</span> in southeastern China
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Global Upper Ordovician correlation by means of δ 13 C chemostratigraphy: implications of the discovery of the Guttenberg δ 13 C excursion (GICE) in Malaysia Available to Purchase

STIG M. BERGSTRÖM, SACHIKO AGEMATSU, BIRGER SCHMITZ
Published: 19 March 2010
Geological Magazine (2010) 147 (5): 641–651.
DOI: https://doi.org/10.1017/S0016756810000142
... and Palaeontology of the Upper Yangtze Platform, South China . Beijing : Science Press , 169 pp. Zhang Jianhua . 1998 . Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China . Stockholm Contributions in Geology 46 , 1 – 161 . ...
View PDF for article title, Global Upper Ordovician correlation by means of δ 13 C chemostratigraphy: implications of the discovery of the Guttenberg δ 13 C excursion (GICE) in Malaysia
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Conodont biozonation in the upper Arenig of Sweden Available to Purchase

A. LÖFGREN
Published: 01 January 2000
Geological Magazine (2000) 137 (1): 53–65.
... och Geokemi 298 , 5 – 27 . Zhang Jianhua . 1998b . Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China . Stockholm Contributions in Geology 46 , 1 – 161 . Zhang Jianhua & Sturkell , E. F. F. 1998 . Aserian...
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View PDF for article title, Conodont biozonation in the upper Arenig of Sweden
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Conodont biostratigraphy and faunal assemblages in radiolarian ribbon-banded cherts of the Burubaital Formation, West Balkhash Region, Kazakhstan Available to Purchase

TATIANA TOLMACHEVA, LARS HOLMER, LEONID POPOV, IVAN GOGIN
Published: 01 November 2004
Geological Magazine (2004) 141 (6): 699–715.
DOI: https://doi.org/10.1017/S0016756804009902
... blueschist/greenschist belt, South Tianshan, Tajikistan: Seamount volcanism and accretionary tectonics . Lithos 47 , 201 – 16 . Zhang , J. 1998 . Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan provinces, south-central China . Stockholm Contributions in Geology 46 , 161...
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View PDF for article title, Conodont biostratigraphy and faunal assemblages in radiolarian ribbon-banded cherts of the Burubaital <span class="search-highlight">Formation</span>, West Balkhash Region, Kazakhstan
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Middle Ordovician linguliformean microbrachiopods from western Argentina: new data and biogeographic implications Available to Purchase

Fernando J. Lavié, Ana I. Mestre, Marcelo G. Carrera
Published: 01 July 2021
Journal of Paleontology (2021) 95 (4): 720–732.
DOI: https://doi.org/10.1017/jpa.2021.19
...), Geology , v. 8 , p. 223 – 254 . Zhang , J. , 1995 , Ordovician phosphatic inarticulate brachiopods from Cili, Hunan : Acta Palaeontologica Sinica , v. 34 , p. 152 – 170 . [in Chinese] Zhang , J.H. , 1998 , Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan...
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View PDF for article title, Middle Ordovician linguliformean microbrachiopods from western Argentina: new data and biogeographic implications
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SUBSPECIATION WITHIN A PUNCTUATED EQUILIBRIUM EVOLUTIONARY EVENT: PHYLOGENETIC HISTORY OF THE LOWER-MIDDLE ORDOVICIAN PAROISTODUS ORIGINALIS–P. HORRIDUS COMPLEX (CONODONTA) Available to Purchase

GUILLERMO L. ALBANESI, CHRISTOPHER R. BARNES
Published: 01 May 2000
Journal of Paleontology (2000) 74 (3): 492–502.
DOI: https://doi.org/10.1666/0022-3360(2000)074<0492:SWAPEE>2.0.CO;2
.... A. Astini . 1996 . The Argentine Precordillera: A traveler from the Ouachita Embayment of North American Laurentia . Science , 273 : 752 - 757 . Zhang , J. 1998 . Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China . Acta Universitatis...
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View PDF for article title, SUBSPECIATION WITHIN A PUNCTUATED EQUILIBRIUM EVOLUTIONARY EVENT: PHYLOGENETIC HISTORY OF THE LOWER-MIDDLE ORDOVICIAN PAROISTODUS ORIGINALIS–P. HORRIDUS COMPLEX (CONODONTA)
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Biostratigraphy and palaeoecology of Middle–Late Ordovician conodont and graptolite faunas of the Las Chacritas River section, Precordillera of San Juan, Argentina Available to Purchase

FERNANDA SERRA, GUILLERMO L. ALBANESI, GLADYS ORTEGA, STIG M. BERGSTRÖM
Published: 29 January 2015
Geological Magazine (2015) 152 (5): 813–829.
DOI: https://doi.org/10.1017/S0016756814000752
... Press . Zhang J-H. 1998 a . Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China . Stockholm Contributions in Geology 46 , 1 – 161 . Zhang...
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View PDF for article title, Biostratigraphy and palaeoecology of Middle–Late Ordovician conodont and graptolite faunas of the Las Chacritas River section, Precordillera of San Juan, Argentina
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Integrated conodont biostratigraphy and carbon isotope chemostratigraphy in the Lower–Middle Ordovician of southern Sweden reveals a complete record of the MDICE Available to Purchase

RONGCHANG WU, MIKAEL CALNER, OLIVER LEHNERT
Published: 22 February 2016
Geological Magazine (2017) 154 (2): 334–353.
DOI: https://doi.org/10.1017/S0016756816000017
... för Geologi Och Geokemi 298 , 5 – 27 . Zhang J. H. 1998 b. Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China . Stockholm Contributions in Geology 46...
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View PDF for article title, Integrated conodont biostratigraphy and carbon isotope chemostratigraphy in the Lower–Middle Ordovician of southern Sweden reveals a complete record of the MDICE
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Sedimentary facies and trilobite and conodont faunas of the Ordovician Rann Formation, Ras Al Khaimah, United Arab Emirates Open Access

Richard A. Fortey, Alan P. Heward, C. Giles Miller
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 October 2011
GeoArabia (2011) 16 (4): 127–152.
DOI: https://doi.org/10.2113/geoarabia1604127
... Universitets Institution för Geologi och Geokemi , v. 298 , p. 1 – 35 . Zhang , J.-H. 1998c . Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China . Stockholm Contributions in Geology , v...
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View PDF for article title, Sedimentary facies and trilobite and conodont faunas of the Ordovician Rann <span class="search-highlight">Formation</span>, Ras Al Khaimah, United Arab Emirates
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An Early to Middle Ordovician succession of conodont faunas at Mäekalda, northern Estonia Available to Purchase

VIIVE VIIRA, ANITA LÖFGREN, SILVI MÄGI, JENNY WICKSTRÖM
Published: 01 November 2001
Geological Magazine (2001) 138 (6): 699–718.
DOI: https://doi.org/10.1017/S0016756801005945
... Ordovician conodonts from the Atlantic Faunal Region and the evolution of key conodont genera . Meddelanden från Stockholms Universitets institution för geologi och geokemi 298 , 5 – 27 . Zhang Jianhua . 1998b . Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces...
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View PDF for article title, An Early to Middle Ordovician succession of conodont faunas at Mäekalda, northern Estonia
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The conodont fauna in the Middle Ordovician Eoplacognathus pseudoplanus Zone of Baltoscandia Available to Purchase

ANITA LÖFGREN
Published: 01 July 2004
Geological Magazine (2004) 141 (4): 505–524.
DOI: https://doi.org/10.1017/S0016756804009227
... från Stockholms Universitets institution för geologi och geokemi 298 , 5 – 27 . Zhang Jianhua . 1998b . Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China . Stockholm Contributions in Geology 46 , 1 – 161 . Zhen Yong-yi...
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View PDF for article title, The conodont fauna in the Middle Ordovician Eoplacognathus pseudoplanus Zone of Baltoscandia
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Darriwilian (Middle Ordovician) new trilobites from the Upper Yangtze Region, South China, and their macroevolutionary and paleobiogeographic implications Available to Purchase

Xin Wei, Zhi-Qiang Zhou, Ren-Bin Zhan, Rong-Chang Wu, Fang-Yi Gong, Jian-Bo Liu
Published: 01 March 2022
Journal of Paleontology (2022) 96 (2): 394–411.
DOI: https://doi.org/10.1017/jpa.2021.110
.... Report 3 : Tokyo , Tokyo Geographical Society , 221 p. Zhang , J.H. , 1998 , Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China : Acta Universitatis Stockholmiensis, Stockholm Contributions in Geology , v. 46 , 161 p. Zhang , L.N...
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View PDF for article title, Darriwilian (Middle Ordovician) new trilobites from the Upper Yangtze Region, South China, and their macroevolutionary and paleobiogeographic implications
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CONODONTS FROM A PLATFORM-TO-BASIN TRANSECT, LOWER ORDOVICIAN TO LOWER SILURIAN, NORTHEASTERN BRITISH COLUMBIA, CANADA Available to Purchase

LEANNE J. PYLE, CHRISTOPHER R. BARNES
Published: 01 January 2003
Journal of Paleontology (2003) 77 (1): 146–171.
DOI: https://doi.org/10.1666/0022-3360(2003)077<0146:CFAPTB>2.0.CO;2
... from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China . Stockholm Contributions in Geology , 46 :: 1 – 161 . Zhang , J. 1998 b. The Ordovician conodont genus Pygodus , p. 87 – 105 . In H. Szaniawski (ed.), Proceedings of the Sixth European...
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View PDF for article title, CONODONTS FROM A PLATFORM-TO-BASIN TRANSECT, LOWER ORDOVICIAN TO LOWER SILURIAN, NORTHEASTERN BRITISH COLUMBIA, CANADA
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