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Maocaopu China

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Journal Article

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
... in Baltoscandia as well as in China. It should be noted that, because of a prominent stratigraphic gap, the entire top half of Isotope Zone 3 (MDICE) is missing in the Maocaopu section, and much, if not all, of this interval is not present also in the Puxi River section. Both in Baltoscandia...
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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 <span class="search-highlight">China</span>: implications of its first recorded occurrences outside Baltoscandia
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Journal Article

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
... of The Paleontological Society 2021 The Author(s) Sinagnostus mirabilis n. sp., uppermost Zitai and Kuniutan formations (lower–middle Darriwilian), Maocaopu, Taoyuan County, Hunan Province. As for the type species. From Latin Sino meaning “China,” where all currently known specimens...
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View PDF for article title, Darriwilian (Middle Ordovician) new trilobites from the Upper Yangtze Region, South <span class="search-highlight">China</span>, and their macroevolutionary and paleobiogeographic implications
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Figure 7.

Opportunistic foraminifer Hemigordiellina regularis (Lipina, 1949) ... Available to Purchase

Published: 07 August 2015
Figure 7. Opportunistic foraminifer Hemigordiellina regularis (Lipina, 1949) from the Lower Triassic of South China. (a, b) upper Maocaopu Formation of the Xiangkou section, Guizhou Province; (c, d) lower Jialingjiang Formation of the Wufeng
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Figure 8.

Opportunistic foraminifer Hoyenella spp. from the Lower Triassic ... Available to Purchase

Published: 07 August 2015
Figure 8. Opportunistic foraminifer Hoyenella spp. from the Lower Triassic of South China. (a, b) Upper Tongjiezi Formation of the Shangsi section, Sichuan Province; (c) upper Maocaopu Formation of the Xiangkou section, Guizhou Province; (d) lower
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Figure 11.

Opportunistic foraminifer Meandrospira pusilla (Ho, 1959 ) from the Lowe... Available to Purchase

Published: 07 August 2015
Figure 11. Opportunistic foraminifer Meandrospira pusilla (Ho, 1959 ) from the Lower Triassic of South China. (a) Lower Jialingjiang Formation of the Wufeng section, Hubei Province; (b) upper Tongjiezi Formation of the Shangsi section, Sichuan Province; (c
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Figure 5.

Disaster and opportunistic foraminifer Earlandia sp. from the ... Available to Purchase

Published: 07 August 2015
Figure 5. Disaster and opportunistic foraminifer Earlandia sp. from the Permian–Triassic boundary strata and Lower Triassic of South China. (a) Lowermost Tieshikou Formation of the Tieshikou section, Jiangxi Province; (b) lowermost Feixianguan
Journal Article

Early Triassic disaster and opportunistic foraminifers in South China Available to Purchase

HAIJUN SONG, JINNAN TONG, PAUL B. WIGNALL, MAO LUO, LI TIAN, HUYUE SONG, YUNFEI HUANG, DAOLIANG CHU
Published: 07 August 2015
Geological Magazine (2016) 153 (2): 298–315.
DOI: https://doi.org/10.1017/S0016756815000497
...Figure 7. Opportunistic foraminifer Hemigordiellina regularis (Lipina, 1949) from the Lower Triassic of South China. (a, b) upper Maocaopu Formation of the Xiangkou section, Guizhou Province; (c, d) lower Jialingjiang Formation of the Wufeng...
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View PDF for article title, Early Triassic disaster and opportunistic foraminifers in South <span class="search-highlight">China</span>
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Diagram showing the application of the isotope zones of Ainsaar et al. (2007) to the study successions. Following the zone definition of Ainsaar et al. (2007), Isotope Zone 3 (shaded) starts in the middle part of the Microzarkodina ozarkodella Subzone in Baltoscandia as well as in China. It should be noted that, because of a prominent stratigraphic gap, the entire top half of Isotope Zone 3 (MDICE) is missing in the Maocaopu section, and much, if not all, of this interval is not present also in the Puxi River section.

Diagram showing the application of the isotope zones of Ainsaar et al . (... Available to Purchase

Published: 01 March 2010
as in China. It should be noted that, because of a prominent stratigraphic gap, the entire top half of Isotope Zone 3 (MDICE) is missing in the Maocaopu section, and much, if not all, of this interval is not present also in the Puxi River section.
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Sketch-map showing Darriwilian facies belts in eastern Baltoscandia (a) (modified after Jaanusson 1982) and southern China (b) (modified after Zhang 1996) and the location of study localities. It should be noted that the two Swedish study localities are situated in a transition facies belt between the deeper-water Scanian–Oslo facies belt and the shallower-water Estonian shelf facies belt whereas both of the Chinese study localities are located on the Yangtze Platform facies belt although Maocaopu is situated near its southern margin.

Sketch-map showing Darriwilian facies belts in eastern Baltoscandia ( a ) (... Available to Purchase

Published: 01 March 2010
Fig. 2. Sketch-map showing Darriwilian facies belts in eastern Baltoscandia ( a ) (modified after Jaanusson 1982 ) and southern China ( b ) (modified after Zhang 1996 ) and the location of study localities. It should be noted that the two Swedish study localities are situated in a transition
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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
Journal Article

Integrated conodont biostratigraphy and stable isotope chemostratigraphy from the Tremadocian (Lower Ordovician) of the Yangtze Platform, South China Open Access

Guanzhou Yan, Jianbo Liu, Oliver Lehnert, Xiaocong Luan, Mikael Calner, Rongchang Wu
Published: 21 February 2025
Journal of the Geological Society (2025) 182 (3): jgs2024-214.
DOI: https://doi.org/10.1144/jgs2024-214
...Guanzhou Yan; Jianbo Liu; Oliver Lehnert; Xiaocong Luan; Mikael Calner; Rongchang Wu Tremadocian (Lower Ordovician) carbonate rocks were collected from the Xiangshuidong section in the Hubei Province, South China, and analysed for conodont biostratigraphy. A total of 24 species belonging to 16...
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Biostratigraphically based diagram showing how the stratigraphically seemingly complete δ13C curve from the Mehikoorma (421) drill-core compares with the incomplete δ13C curves from the Hällekis Quarry, Maocaopu, and Puxi River sections. Because the principal purpose of this diagram is to illustrate the similarity in the δ13C curves, the vertical scale is not the same in the four successions, as is also the case in Figure 9. Stratigraphic gaps indicated by conodont biostratigraphy are shown by vertical ruling. The absence of the upper portion of the MDICE in the Hällekis Quarry and Chinese sections should be noted. The diagram is based on the assumption that the various conodont zones and subzones are coeval between Baltoscandia and China. The currently available stratigraphic resolution of the conodont biostratigraphy is insufficient to prove or disprove the possibility that the stratigraphic gaps shown as corresponding to the Eoplacognathus suecicus Zone and slightly younger strata may be even larger than illustrated and also include parts of the Microzarkodina ozarkodella Subzone and/or of the Pygodus anserinus Zone in the Chinese sections.

Biostratigraphically based diagram showing how the stratigraphically seemin... Available to Purchase

Published: 01 March 2010
Fig. 8. Biostratigraphically based diagram showing how the stratigraphically seemingly complete δ 13 C curve from the Mehikoorma (421) drill-core compares with the incomplete δ 13 C curves from the Hällekis Quarry, Maocaopu, and Puxi River sections. Because the principal purpose of this diagram
Image
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
Journal Article

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
... Löfgren, 1999 is very rare in the interval. Of particular interest are the finds of Sagittodontina sp., Complexodus sp. and Triangulodus cf. T. maocaopus. Rare elements of Sagittodontina have previously been found in the Llanvirn of Baltica and southern China ( Dzik, 1994 ) and Complexodus...
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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
... the Hällekis quarry, southern Sweden, and the Maocaopu and Puxi river sections, South China, where only the rising and falling limbs are preserved ( Fig. 11 ). These sections seem to lack the peak interval of the MDICE when compared to the detailed δ 13 C carb record...
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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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Journal Article

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
..., together comprising 10,800 elements from Sweden and southern China, all element types of Lenodus antivariabilis ( An, 1981 ), L. variabilis ( Sergeeva, 1963 ), Yangtzeplacognathus crassus (Chen and Zhang, 1993) and Eoplacognathus pseudoplanus ( Viira, 1974 ) are described and discussed. All these species...
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