☆ 4.1 Article

Cambrian series 3 agnostoid trilobites Ptychagnostus sinicus and Ptychagnostus atavus from the Machari Formation, Yeongwol Group, Taebaeksan Basin, Korea

JOURNAL OF PALEONTOLOGY (2015)

Journal

JOURNAL OF PALEONTOLOGY

Volume 89, Issue 3, Pages 377-384

Publisher

CAMBRIDGE UNIV PRESS

DOI: 10.1017/jpa.2015.30

Keywords

-

Categories

Paleontology

Funding

National Research Foundation of Korea [2011-0013164]
National Research Foundation of Korea [2011-0013164] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

Ask authors/readers for more resources

Protocol

Community support

Reagent

Community support

Abstract

This paper reports the successive occurrence of Ptychagnostus sinicus Lu, 1957 and Ptychagnostus atavus (Tullberg, 1880) from the lower part of the Machari Formation, Yeongwol Group, Korea. Morphometric approaches of using the landmark and principal component analyses make it possible to differentiate P. sinicus from P. atavus with clarity: pygidia of P. sinicus have a relatively narrow M1, a transverse F2, and a weakly developed M2 tubercle, whereas those of P. atavus are characterized by a broadly arching M1, a chevron-shaped F2, and a prominent M2 tubercle. Recognition of P. atavus, for the first time in Korea, allows the determination of the base of the Drumian Stage in Korea and aids correlation with other parts of the world.

Authors

I am an author on this paper

Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.1

Not enough ratings

Secondary Ratings

Novelty

-

Significance

-

Scientific rigor

-

Rate this paper

Recommended

Article Geosciences, Multidisciplinary

U-Pb detrital zircon ages of Cambrian-Ordovician sandstones from the Taebaeksan Basin, Korea: Provenance variability in platform shelf sequences and paleogeographic implications

Moonsup Cho, Wonseok Cheong, W. G. Ernst, Yoonsup Kim, Keewook Yi

Summary: The study sheds light on the Paleozoic paleogeography of East Gondwanan terranes, particularly the North China Craton, using new data from sandstones in the Taebaeksan Basin, Korea. It reveals the vestige of coeval arc magmatism and significant changes in provenance, possibly linked to variations in paleowater depths. Detrital zircons with distinct distribution patterns suggest a connection to the proto-Japan arc and indicate a sedimentary influx from contemporaneous volcanic activity.

GEOLOGICAL SOCIETY OF AMERICA BULLETIN (2021)

Add to Collection

Article Geology

Silicification of trilobites and biofilm from the Cambrian Weeks Formation, Utah: Evidence for microbial mediation of silicification

Leslie A. Melim, Sebastien R. Mure-Ravaud, Thomas A. Hegna, Brian J. Bellott, Rudy Lerosey-Aubril

Summary: This study reports on silicified trilobite sclerites with associated silicified biofilm from the Cambrian Weeks Formation, Utah (USA), providing support for the role of microbial biofilms in silicification. The presence of carbon-rich threads, ribbons, and mats coating the sclerites and silica-cemented matrix is interpreted as silicified biofilm. The study also suggests that silica precipitation continued into the surrounding matrix following bacterial decay, supporting the idea that bacterially mediated decay is key to the silicification of carbonate bioclasts.

GEOLOGY (2023)

Add to Collection

Article Geography, Physical

The Central Andean Basin as a dispersal centre: Biogeographic patterns of olenid trilobites during the late Cambrian-Early Ordovician

Daniela S. Monti, Viviana A. Confalonieri, M. Franco Tortello

Summary: This study investigates the biogeographic histories of two cosmopolitan groups of Olenida, Hypermecaspididae and Parabolinella (Olenidae). Different biogeographical models were compared, and the results suggest that jump dispersal was an important speciation strategy for both groups. Vicariance was found to be unimportant. The dispersal patterns of Parabolinella were influenced by ocean currents, while those of Hypermecaspididae were not. Island hopping and creeping were the main dispersal mechanisms for both groups. The western margin of Gondwana played a significant role as a dispersal center during the Furongian and Early Ordovician.

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY (2023)

Add to Collection

Article Geology

Ribbon rocks revisited: the upper Cambrian (Furongian) Hwajeol Formation, Taebaek Group, Korea

Jeong-Hyun Lee, Se Hyun Cho, Da Young Jung, Suk-Joo Choh, Dong-Jin Lee

Summary: The origin of ribbon rocks in the upper Cambrian Hwajeol Formation in Korea is discussed based on detailed microfacies analysis. Different sedimentary microfacies indicate varying formative processes, such as storm-induced bottom currents for shale facies and suspension settling or early diagenetic growth for lime mudstone facies. The proposed formative model for tempestite-type ribbon rock suggests that environmental conditions in the early Palaeozoic promoted their formation, characterized by sea-water chemistry that promoted calcite precipitation and a scarcity of burrowers.

FACIES (2021)

Add to Collection

Article Multidisciplinary Sciences

Life cycle evolution in the trilobites Balangia and Duyunaspis from the Cambrian Series 2 (Stage 4) of South China

Zhengpeng Chen, Yuanlong Zhao, Xinglian Yang, Jorge Esteve, Xiong Liu, Shengguang Chen

Summary: The evolution process can be reconstructed by tracking the changes in the dynamic characters of life cycles. Trilobite evolutionary patterns are studied using related trilobites from the Cambrian of South China, providing additional information due to previous incomplete fossil records. The study discusses the ontogeny of Balangia and Duyunaspis, revealing a directional evolution in their exoskeletal morphology. Based on the evolutionary changes observed, it is speculated that Duyunaspis evolved from Balangia instead of the previous assumption of Balangia evolving from Duyunaspis. The findings also support the inference made by the phylogenetic tree.

PEERJ (2023)

Add to Collection

Article Geosciences, Multidisciplinary

Maturity evolution of Lower Cambrian Qiongzhusi Formation shale of the Sichuan Basin

Qiu Nansheng, Liu Wen, Fu Xiaodong, Li Wenzheng, Xu Qiuchen, Zhu Chuanqing

Summary: This study analyzes the thermal history and denudation data of the Lower Cambrian Qiongzhusi Formation source rocks in the Sichuan Basin, leading to the identification of different maturity evolution patterns and key hydrocarbon generation stages in various tectonic units. The main factors controlling the thermal maturity and evolution models are determined to be tectonic and sedimentary burial during the Late Permian, with the thermal maturity of the formation depending on the thermal history and maximum burial depth before uplift in the Late Cretaceous. The study provides new insights into the source rock evolution and shale gas potential in the Lower Paleozoic.

MARINE AND PETROLEUM GEOLOGY (2021)

Add to Collection

Article Energy & Fuels

Factors influencing stylolite formation in the Cambrian Longwangmiao Formation, Sichuan Basin, SW China

Weiqiang Yang, Huayao Zou, Ting Li, Liwen Hu, Chengkun Deng, Zhongzhen Cheng, Caijun Lan, Zhehang Xu, Haoru Chen, Chaojin Lu, Pingping Li

Summary: This study evaluates the influence of stylolites on the carbonate reservoirs of the Longwangmiao Formation. It finds that the dolomite content and carbonate lithofacies are related to the density and amplitude of stylolites.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

Add to Collection

Article Geosciences, Multidisciplinary

First confident evidence of moulting in eodiscid trilobites from the Cambrian Stage 3 of South China

Yifan Wang, Jorge Esteve, Xinglian Yang, Rongxing Yu, Dezhi Wang

Summary: This study reports on two specimens of eodiscid trilobites, which show a Somersault configuration using facial and rostral sutures to create an anterior exuvial gape. This discovery is important for understanding trilobite moulting behavior during the Cambrian period.

GEOLOGICAL MAGAZINE (2023)

Add to Collection

Article Paleontology

Continuous character variation within the Glossopleura-Anoria-Sonoraspis plexus: Dolichometopid trilobites from the Cadiz Formation (Cambrian: Miaolingian, Wuliuan), California

John R. Foster

Summary: The restudy of dolichometopid trilobites in the Cadiz Formation in California, USA, and other formations in western North America reveals that there are only two species present in the Cadiz Formation. Additionally, qualitative characters used in the past for genus separation are found to be continuously variable, making them unreliable for species assignment.

PALAEONTOLOGIA ELECTRONICA (2022)

Add to Collection

Article Geosciences, Multidisciplinary

Recrystallization of dolostones in the Cambrian Xiaoerbrak Formation, Tarim Basin and possible link to reservoir development

Yinggang Zhang, Wenqing Pan, Bi Zhu, Weiqiang Li, Liu Willow Yang, Yongquan Chen, Tao Yang

Summary: This study examines the variation in dolomite crystallization parameters and element concentrations in the Xiaoerbrak Formation. The results suggest that the dolostones experienced progressive recrystallizations and the reservoir quality was strongly influenced by the original rock petrophysics, controlled by microbial structures and depositional facies. Additionally, the pre-existing pore network in carbonates could provide pathways for fluid alteration, indicating that carbonates with higher porosity are more likely to be altered.

MARINE AND PETROLEUM GEOLOGY (2022)

Add to Collection

Article Geochemistry & Geophysics

The Origin of the Upper Cambrian Basin-Scale Massive Dolostones of the Xixiangchi Formation, Sichuan Basin, China

Huan Hu, Shenglin Xu, Anqing Chen, Long Wen, Benjian Zhang, Xihua Zhang, Fuxiang Li, Mengqi Liu, Wei Yong

Summary: This study investigates the characteristics and genesis of the Late Upper Cambrian Xixiangchi dolostones in the Sichuan Basin. Three types of dolomite were identified, each formed in a different environment and process. Type 1 dolomite formed in a supratidal environment influenced by continental factors, Type 2 dolomite formed in a beach environment, and Type 3 dolomite underwent further burial dolomitization. These findings have important implications for predicting dolomite porosity distribution and identifying hydrocarbon reservoirs.

MINERALS (2023)

Add to Collection

Article Geosciences, Multidisciplinary

Multistage dolomitization of deeply buried dolomite in the Lower Cambrian Canglangpu Formation, central and northern Sichuan Basin

Huixuan Huang, Huaguo Wen, Long Wen, Benjian Zhang, Gang Zhou, Yuan He, Longbin Wen, Yan Zhao, Huachuan Jiang

Summary: The dolostone units in the Cambrian Changlangpu Formation of the Sichuan Basin show significant natural gas exploration potential. This study combines petrographic properties and geochemical evidence to understand the different phases of dolomite and their diagenetic pathways. The findings include six identified dolomite phases and their corresponding formation processes. The research also provides insights into the implications of fluid inclusion evidence and rare-earth element data.

MARINE AND PETROLEUM GEOLOGY (2023)

Add to Collection

Article Geosciences, Multidisciplinary

Research on Reservoir Characteristics and Main Controlling Factors of Longwangmiao Formation of Cambrian in Sichuan Basin

Qiang Wang, Xingzhi Wang, Xinyao Zeng

Summary: Based on geological analysis and testing, as well as reservoir logging interpretation, the reservoir characteristics and formation factors of the Longwangmiao Formation in the Sichuan Basin were analyzed. The marginal bank of the underwater paleo-uplift and island sediment within the platform are the most favorable conditions for reservoir formation, with dolomitization and dissolution playing crucial roles.

FRONTIERS IN EARTH SCIENCE (2022)

Add to Collection

Article Geosciences, Multidisciplinary

Frenchman Mountain Dolostone: A new formation of the Cambrian Tonto Group, Grand Canyon and Basin and Range, USA

Stephen M. Rowland, Slava Korolev, James W. Hagadorn, Kaushik Ghosh

Summary: This study describes the Frenchman Mountain Dolostone (FMD), a significant Cambrian stratigraphic unit that exposes key global geochemical and climate signals. The FMD replaces the undifferentiated dolomites and records two global chemostratigraphic events, namely the Drumian Carbon Isotope Excursion (DICE) and the Steptoean Positive Carbon Isotope Excursion (SPICE). The formation consists of eight lithofacies deposited in shallow subtidal to peritidal paleoenvironments and spans approximately 7.2 million years.

GEOSPHERE (2023)

Add to Collection

Article Paleontology

A Guzhangian (late Middle Cambrian) fauna from the Gidgealpa 1 drillhole, Warburton Basin, South Australia

X. W. Sun, C. J. Bentley, J. B. Jago

Summary: This study describes a Cambrian Series 3 fauna from the Warburton Basin in northeastern South Australia, including agnostoid and polymerid trilobite taxa. The fauna suggests a correlation with specific biostratigraphic zones and represents the first published descriptions of fossils of this age from the Warburton Basin.

ALCHERINGA (2021)

Add to Collection

Article Geosciences, Multidisciplinary

Trilobite Biostratigraphy of the lower Paleozoic (Cambrian-Ordovician) Joseon Supergroup, Taebaeksan Basin, Korea

Duck K. Choi, Jeong Gu Lee, Seung-Bae Lee, Tae-Yoon S. Park, Paul S. Hong

ACTA GEOLOGICA SINICA-ENGLISH EDITION (2016)

Add to Collection

Article Geosciences, Multidisciplinary

Recent advances of trilobite research in Korea: Taxonomy, biostratigraphy, paleogeography, and ontogeny and phylogeny

Duck K. Choi, Tae-Yoon S. Park

GEOSCIENCES JOURNAL (2017)

Add to Collection

Article Geosciences, Multidisciplinary

Middle Furongian (late Cambrian) polymerid trilobites from the upper part of the Sesong Formation, Taebaeksan Basin, Korea

Tae-Yoon Park, Jang Won Sohn, Duck K. Choi

GEOSCIENCES JOURNAL (2012)

Add to Collection

Article Geosciences, Multidisciplinary

The Okcheon Supergroup in the Lake Chungju area, Korea: Neoproterozoic volcanic and glaciogenic sedimentary successions in a rift basin

Duck K. Choi, Jusun Woo, Tae-yoon Park

GEOSCIENCES JOURNAL (2012)

Add to Collection

Article Geosciences, Multidisciplinary

Late Ordovician volcanism in Korea constrains the timing for breakup of Sino-Korean Craton from Gondwana

Deung-Lyong Cho, Seung Ryeol Lee, Hee Jae Koh, Jun-Beom Park, Richard Armstrong, Duck K. Choi

JOURNAL OF ASIAN EARTH SCIENCES (2014)

Add to Collection

Article Paleontology

OCCURRENCE OF THE ISOPOD ARCHAEONISCUS COREAENSIS NEW SPECIES FROM THE LOWER CRETACEOUS JINJU FORMATION, KOREA

Tae-Yoon Park, George D. F. Wilson, Dong-Chan Lee, Duck K. Choi

JOURNAL OF PALEONTOLOGY (2012)

Add to Collection

Article Paleontology

MIDDLE FURONGIAN (LATE CAMBRIAN) SHUMARDIIDS FROM THE SESONG FORMATION, TAEBAEK GROUP KOREA

Tae-Yoon Park, Duck K. Choi

JOURNAL OF PALEONTOLOGY (2012)

Add to Collection

Article Paleontology

ONTOGENY OF THE PTYCHASPIDID TRILOBITE QUADRATICEPHALUS ELONGATUS KOBAYASHI, 1935 FROM THE FURONGIAN (LATE CAMBRIAN) HWAJEOL FORMATION, KOREA

Ji-Hoon Kihm, Tae-Yoon Park, Duck K. Choi

JOURNAL OF PALEONTOLOGY (2013)

Add to Collection

Article Paleontology

LATE MIDDLE CAMBRIAN (CAMBRIAN SERIES 3) TRILOBITE FAUNAS FROM THE LOWERMOST PART OF THE SE SONG FORMATION, KOREA AND THEIR CORRELATION WITH NORTH CHINA

Tae-Yoon Park, Ji-Hoon Kihm, Duck K. Choi

JOURNAL OF PALEONTOLOGY (2013)

Add to Collection

Article Paleontology

ONTOGENY OF A NEW SPECIES OF THE CAMBRIAN SERIES 3 (MIDDLE CAMBRIAN) TRILOBITE GENUS LIOSTRACINA MONKE, 1903 FROM NORTH CHINA AND THE TAXONOMIC POSITION OF THE SUPERFAMILY TRINUCLEOIDEA

Tae-Yoon S. Park, Ji-Hoon Kihm, Imseong Kang, Duck K. Choi

JOURNAL OF PALEONTOLOGY (2014)

Add to Collection

Article Paleontology

MANSUYIA SUN, 1924 AND TSINANIA WALCOTT, 1914 FROM THE FURONGIAN OF NORTH CHINA AND THE EVOLUTION OF THE TRILOBITE FAMILY TSINANIIDAE

Tae-Yoon Park, Ju Eon Kim, Seung-Bae Lee, Duck K. Choi

PALAEONTOLOGY (2014)

Add to Collection

Article Geosciences, Multidisciplinary

Evolution of the Taebaeksan Basin, Korea: I, early Paleozoic sedimentation in an epeiric sea and break-up of the Sino-Korean Craton from Gondwana

Duck K. Choi

ISLAND ARC (2019)

Add to Collection

Article Geosciences, Multidisciplinary

Evolution of the Taebaeksan Basin, Korea: II, late Paleozoic sedimentation in a retroarc foreland basin and assembly of the proto-Korean Peninsula

Duck K. Choi

ISLAND ARC (2019)

Add to Collection

Article Geosciences, Multidisciplinary

Challenges in defining the base of Cambrian Series 2 and Stage 3

Xingliang Zhang, Per Ahlberg, Loren E. Babcock, Duck K. Choi, Gerd Geyer, Rodolfo Gozalo, J. Stewart Hollingsworth, Guoxiang Li, Elena B. Naimark, Tatyana Pegel, Michael Steiner, Thomas Wotte, Zhifei Zhang

EARTH-SCIENCE REVIEWS (2017)

Add to Collection

No Data Available

© Peeref 2019-2024. All rights reserved.