Conodont biostratigraphy and astronomical tuning of the Lower–Middle Ordovician Liangjiashan (North China) and Huanghuachang (South China) marine sections

2019 ◽  
Vol 528 ◽  
pp. 272-287 ◽  
Author(s):  
Kunyuan Ma ◽  
Ruochen Li ◽  
Linda A. Hinnov ◽  
Yiming Gong
Keyword(s):  
South China ◽  
North China ◽  
Conodont Biostratigraphy ◽  
Middle Ordovician ◽  
Astronomical Tuning

Integrated conodont biostratigraphy and carbon isotope chemostratigraphy in the Lower–Middle Ordovician of southern Sweden reveals a complete record of the MDICE

2016 ◽  
Vol 154 (2) ◽  
pp. 334-353 ◽  
Author(s):  
RONGCHANG WU ◽  
MIKAEL CALNER ◽  
OLIVER LEHNERT
Keyword(s):  
North America ◽  
Carbon Isotope ◽  
South China ◽  
North China ◽  
Southern Sweden ◽  
Conodont Biostratigraphy ◽  
Middle Ordovician ◽  
The Core ◽  
Core Section ◽  
Argentine Precordillera

AbstractOne of the few and most complete records of the MDICE (Middle Darriwilian Isotope Carbon Excursion) is herein documented from Baltoscandia. Based on a core section penetrating the condensed Lower–Middle Ordovician succession (~46 m) on the island of Öland, southeastern Sweden, we provide an integrated scheme for carbon isotope chemostratigraphy (313 samples) and conodont biostratigraphy (29 samples) for this period. The carbonate succession in the Tingskullen core records 12 conodont zones and 6 subzones, including theOepikodus evae, Trapezognathus diprion, Baltoniodus triangularis, B. navis, B. norrlandicus, Lenodus antivariabilis, L. variabilis, Yangtzeplacognathus crassus, Eoplacognathus pseudoplanus(Microzarkodina hagetianaandMicrozarkodina ozarkodellasubzones),E. suecicus, Pygodus serra(E. foliaceus, E. reclinatus, E. robustusandE. lindstroemisubzones) andPygodus anserinuszones in ascending order. The δ13Ccarbrecord reveals an apparently complete record of the MDICE, including a rising limb, a well-defined peak and a falling limb. The anomaly covers a thickness ofc. 27 m in the core and spans theEoplacognathus pseudoplanus, E. suecicus, Pygodus serraandP. anserinusconodont zones. Combined with the new, detailed conodont biostratigraphy, the MDICE in the Tingskullen core can be used for detailed correlation with successions from Baltica, North America, the Argentine Precordillera, South China and North China.

Middle Ordovician actinocerid nautiloids (Cephalopoda) from Xainza County, Tibet, western China, and their paleogeographic implications

2018 ◽  
Vol 92 (3) ◽  
pp. 398-411 ◽  
Author(s):  
Xiang Fang ◽  
Tingen Chen ◽  
Clive Burrett ◽  
Yongsheng Wang ◽  
Yonggui Qu ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
New Species ◽  
North America ◽  
South China ◽  
North China ◽  
Western China ◽  
Middle Ordovician ◽  
Lhasa Terrane ◽  
First Time ◽  
The Himalaya

AbstractActinocerid nautiloids from the Lhasai Formation in the Xainza region are studied systematically for the first time. The nautiloids are identified as Middle Ordovician in age based on stratigraphic correlations with those from North China, Sibumasu, North Australia (northern Gondwana), and North America (Laurentia). A cluster analysis shows strong affinities between the actinocerid nautiloids of the Lhasa Terrane and those of the Himalaya, North China, and Sibumasu terranes. Our results support Middle Ordovician paleogeographic reconstructions that place North China rather than South China much closer to Australia. Nine species assigned to six genera of Meitanoceratidae, Wutinoceratidae, Armenoceratidae, Ormoceratidae, and Discoactinoceratidae are described in detail:Pomphoceras nyalamense(Chen, 1975),Pomphoceras yaliense(Chen, 1975),Wutinocerascf.W.foerstei(Endo, 1930),Mesowutinoceras giganteumChen in Chen and Zou, 1984,Armenoceras tani(Grabau, 1922),Armenoceras teichertiEndo, 1932,Armenoceras xizangensenew species,Deiroceras globosomZou and Shen in Chen and Zou, 1984, andDiscoactinocerascf.D.multiplexumKobayashi, 1927.UUID:http://zoobank.org/ba851fea-e107-4754-a0f4-a70744e325ab

scholarly journals Late Ordovician palaeogeography and the positions of the Kazakh terranes through analysis of their brachiopod faunas

2017 ◽  
Vol 67 (3) ◽  
pp. 323-380 ◽  
Author(s):  
Leonid E. Popov ◽  
Robin M. Cocks
Keyword(s):  
South China ◽  
North China ◽  
Late Ordovician ◽  
Time Span ◽  
The Other ◽  
Island Arcs ◽  
Western Margin ◽  
Middle Ordovician ◽  
Gondwana Supercontinent ◽  
The Tropics

AbstractDetailed biogeographical and biofacies analyses of the Late Ordovician brachiopod faunas with 160 genera, grouped into 94 faunas from individual lithotectonic units within the Kazakh Orogen strongly support an archipelago model for that time in that area. The Kazakh island arcs and microcontinents within several separate clusters were located in the tropics on both sides of the Equator. Key units, from which the Late Ordovician faunas are now well known, include the Boshchekul, Chingiz-Tarbagatai, and Chu-Ili terranes. The development of brachiopod biogeography within the nearly ten million year time span of the Late Ordovician from about 458 to 443 Ma (Sandbian, Katian, and Hirnantian), is supported by much new data, including our revised identifications from the Kazakh Orogen and elsewhere. The Kazakh archipelago was west of the Australasian segment of the Gondwana Supercontinent, and relatively near the Tarim, South China and North China continents, apart from the Atashu-Zhamshi Microcontinent, which probably occupied a relatively isolated position on the south-western margin of the archipelago. Distinct faunal signatures indicate that the Kazakh terranes were far away from Baltica and Siberia throughout the Ordovician. Although some earlier terranes had joined each other before the Middle Ordovician, the amalgamation of Kazakh terranes into the single continent of Kazakhstania by the end of the Ordovician is very unlikely. The Late Ordovician brachiopods from the other continents are also compared with the Kazakh faunas and global provincialisation statistically determined.

Microphytoplankton diversity curves of the Chinese Ordovician

2007 ◽  
Vol 178 (5) ◽  
pp. 399-409 ◽  
Author(s):  
Jun Li ◽  
Thomas Servais ◽  
Kui Yan ◽  
Wenbo Su
Keyword(s):  
Sea Level ◽  
South China ◽  
North China ◽  
Species Level ◽  
Level Curve ◽  
Global Level ◽  
Sea Level Changes ◽  
Yangtze Platform ◽  
Generic Level ◽  
Middle Ordovician

Abstract Following the publication of a regional diversity curve of the Ordovician organic-walled microphytoplankton (acritarchs) from the Yangtze Platform at the species level [Servais et al., 2004], a diversity curve for China is here presented using all literature data at the generic level. The Chinese curve is a compilation of three separate curves from the three major continental blocks that constituted China in the Ordovician: South China (including the Yangtze Platform), Tarim and North China. The diversity changes can partly be related to sea level changes, both at a regional (South Chinese sea level curve) and at a global level (global curve). The totalised curve for all Chinese localities indicates peaks in diversity that apparently correspond to three sea level highstands at a global level at the early-middle Ordovician boundary (middle “Arenigian”), at the Sandbian-Katian boundary (middle “Caradocian”) and during the Upper Katian (pre-Hirnantian “Ashgillian”) Boda Event [Fortey and Cocks, 2005].

Darriwilian (Middle Ordovician) new trilobites from the Upper Yangtze Region, South China, and their macroevolutionary and paleobiogeographic implications

2021 ◽  
pp. 1-18
Author(s):  
Xin Wei ◽  
Zhi-Qiang Zhou ◽  
Ren-Bin Zhan ◽  
Rong-Chang Wu ◽  
Fang-Yi Gong ◽  
...  
Keyword(s):  
New Species ◽  
South China ◽  
North China ◽  
New Genus ◽  
New Genera ◽  
Middle Ordovician ◽  
Emended Diagnosis

Abstract Two new genera and six new species of trilobites are systematically documented herein: Sinagnostus mirabilis new genus new species, Yanpingia punctata n. gen. n. sp., Illaenus taoyuanensis n. sp., Panderia striolatus n. sp., Nileus yichongqiaoensis n. sp., and Paratiresias peculiaris n. sp. The materials were collected from the Darriwilian (late Middle Ordovician) strata in the Upper Yangtze Region, South China. Also provided is an emended diagnosis of the genus Paratiresias based on the new species Paratiresias peculiaris, which is the oldest known species of this genus with an extremely narrow (sag. and exsag.) preglabellar field. Those Chinese species previously referred to Nanillaenus are reassigned to Illaenus sensu lato. These trilobites add new data for the Darriwilian trilobite macroevolution and show highly endemic to South China and the faunal exchanges between South China and Tarim, Kazakhstan, Alborz, as well as Sibumasu and North China. UUID: http://zoobank.org/ec3be9be-b003-4367-910d-7a0ac4edc982

Restudy of the Llandovery conodont biostratigraphy in the Xiushan area, Chongqing City, China

2016 ◽  
Vol 53 (7) ◽  
pp. 651-659
Author(s):  
Zhongyang Chen ◽  
Chengyuan Wang ◽  
Ru Fan
Keyword(s):  
South China ◽  
Main Part ◽  
Yangtze Platform ◽  
Conodont Biostratigraphy ◽  
Lower Member ◽  
Chongqing City

Previous studies of conodonts suggested that the upper member of the Xiushan Formation (late Llandovery) corresponds to the Pterospathodus eopennatus Superbiozone, but no data were obtained from the lower member in the Xiushan area. In this study, the entire Xiushan Formation was resampled from the Datianba section in the Xiushan area of Chongqing City on the Yangtze Platform in South China. In total, 40 samples were collected and processed. Fifteen of these samples contained identifiable conodont specimens. The present study indicates that the lower member and main part of the upper member of the Xiushan Formation correspond to the Pterospathodus eopennatus Superbiozone, while the top of the upper member probably correlates with the Pterospathodus celloni Superbiozone.

Carboniferous conodont biostratigraphy of the Dianzishang section, Zhenning, Guizhou, South China

2013 ◽  
Vol 151 (2) ◽  
pp. 311-327 ◽  
Author(s):  
YUPING QI ◽  
KEYI HU ◽  
QIULAI WANG ◽  
WEI LIN
Keyword(s):  
South China ◽  
North American ◽  
Primitive Form ◽  
Conodont Biostratigraphy ◽  
The World ◽  
Kasimovian Stage ◽  
Moscovian Stage ◽  
Stage Boundaries ◽  
Serpukhovian Stage ◽  
Bashkirian Stage

AbstractA preliminary summary of the lower Visean to uppermost Moscovian (Carboniferous) conodont succession and biostratigraphy of the Dianzishang section in Zhenning, Guizhou, South China is presented. Eleven conodont zones, in ascending order, can be recognized:Gnathodus praebilineatus,Gnathodus bilineatus,Lochriea ziegleri,Declinognathodus noduliferus,Neognathodus symmetricus, ‘Streptognathodus’expansus(primitive form), ‘Streptognathodus’expansus,Mesogondolella donbassica – Mesogondolella clarki,Idiognathodus podolskensis,Swadelinafauna andIdiognathodus swadeizones. The first occurrences ofLochriea ziegleriat the base of the Serpukhovian Stage,Declinognathodus noduliferus noduliferusat the base of the Bashkirian Stage and ‘Streptognathodus’expansusat the base of the Moscovian Stage are recognized. The definitions of these stage boundaries, as well as that of the base of the Kasimovian Stage are discussed. Correlations with the Naqing section in South China, Russian and North American sections, as well as other important sections in the world, are considered.

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