Article
Biology
Curtis R. Congreve, Mark E. Patzkowsky, Peter J. Wagner
Summary: The study suggests that rapid divergence of Strophomenoidea brachiopods during the Great Ordovician Biodiversification Event is closely related to environmental changes, with significantly higher speciation rates than typical brachiopods during this period. The high speciation rates and anatomical disparity indicate punctuated evolution processes.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Zhiliang Zhang, Mansoureh Ghobadi Pour, Leonid E. Popov, Lars E. Holmer, Feiyang Chen, Yanlong Chen, Glenn A. Brock, Zhifei Zhang
Summary: This study in South China reveals the oldest Cambrian brachiopod-trilobite association, providing potential for stratigraphic correlation. The new species Eoobolus incipiens represents one of the earliest linguliform brachiopods.
Article
Multidisciplinary Sciences
Farid Saleh, Pauline Guenser, Corentin Gibert, Diego Balseiro, Fernanda Serra, Beatriz G. Waisfeld, Jonathan B. Antcliffe, Allison C. Daley, M. Gabriela Mangano, Luis A. Buatois, Xiaoya Ma, Daniel Vizcaino, Bertrand Lefebvre
Summary: This study investigates the assembly processes of Early Ordovician trilobite and echinoderm communities and finds that dispersal increased over time in trilobite communities but not in echinoderms. Dispersal was likely triggered by factors such as the planktic revolution, fall in seawater temperatures, and changes in oceanic circulation, with control from tectonic frameworks and phylogenetic constraints. The diachronous increase in dispersal within trilobite communities highlights the complexity of ecosystem structuring during the early stages of the Ordovician Radiation.
SCIENTIFIC REPORTS
(2022)
Article
Geosciences, Multidisciplinary
Morteza Derakhshi, Richard E. Ernst, Sandra L. Kamo
Summary: This study reports for the first time a series of voluminous intraplate volcanic events in Iran, which may be a key factor contributing to the Late Ordovician mass extinction (LOME). The volcanic events occurred during the initial rifting of the Paleotethys Ocean and have been identified through fieldwork and dating techniques. The researchers suggest that these volcanic activities represent remnants of a newly proposed Large Igneous Province (LIP) and played a significant role in the environmental and climatic changes associated with LOME.
Article
Geosciences, Multidisciplinary
L. Robin M. Cocks, Leonid E. Popov
Summary: During the Early Ordovician Epoch, the Mediterranean brachiopod Province was extensive in the higher-latitude sectors of the globe in the Southern Hemisphere. The province can be separated into two groups, each dominated by different brachiopod fauna, with distinct distributions in different geographical regions. Additionally, the province merges with more diverse contemporary faunas in lower latitudes and experienced significant radiation of various brachiopod taxa during the period.
GEOLOGICAL MAGAZINE
(2021)
Article
Geosciences, Multidisciplinary
Marc Gil-Ortiz, Neil David McDougall, Patricia Cabello, Mariano Marzo, Emilio Ramos
Summary: The Hawaz Formation is a siliciclastic succession deposited on the cratonic margin of Gondwana during the Middle Ordovician, and is one of the major oil-bearing reservoirs in the Murzuq Basin. Late Ordovician erosion has altered the original sedimentary architecture of the formation, requiring detailed correlation and sedimentary reconstruction for subsurface management. The formation is believed to have been deposited in a relatively protected embayed shoreline environment with unique sedimentary characteristics.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Paleontology
Hadi Jahangir, Zhiliang Zhang, Leonid E. Popov, Lars E. Holmer, Mansoureh Ghobadi Pour, Renbin Zhan
Summary: This study describes the newly discovered species Schizambon tongziensis from the Tungtzu Formation in Guizhou Province, South China. It provides insights into the ontogeny, palaeobiogeographical distribution, phylogeny, and early evolution of siphonotretide brachiopods. The well-preserved specimens reveal that Schizambon had a planktotrophic 'paterinide-type' larva, characteristic of many early Palaeozoic brachiopods.
PAPERS IN PALAEONTOLOGY
(2023)
Article
Geosciences, Multidisciplinary
J. Javier Alvaro, Mansoureh Ghobadi Pour, Teresa Sanchez-Garcia, Mohammad-Reza Kebria-ee Zadeh, Vachik Hairapetian, Leonid E. Popov
Summary: Recent geological mapping and chronostratigraphic dating in the eastern Alborz Mountains have revealed episodes of synsedimentary uplift and erosion associated with volcanic activities. The study also identified continuous magmatic pulses with alkaline to subalkaline activities, suggesting an intraplate field affinity compatible with OIB-like mantle sources. These findings provide insights into the geological history of the region, including lithospheric doming and rift pulses that shaped a large igneous province.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geology
Ramin Samadi, Ghodrat Torabi, Elton Luiz Dantas, Tomoaki Morishita, Hiroshi Kawabata
Summary: This study examines relicts of granitic Gondwanan basement in the northwest of Central-East Iranian Microcontinent, incorporated into an ophiolitic melange. The findings suggest the presence of an Ordovician anatectic granite formed in a syn-collisional setting, with some metamorphic deformation signatures likely developed in the Devonian. The U-Pb zircon ages from this granite are similar to other Ordovician collision-related magmatic events in the CEIM.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geochemistry & Geophysics
Chengshi Gan, Xin Qian, Yuzhi Zhang, Tianxing Bai, Yuejun Wang
Summary: This study investigates the provenance, paleogeographic reconstruction and tectonic setting of the Cambrian sandstones in the South China Block (SCB) through detailed detrital zircon U-Pb geochronology and Hf isotope analyses. The results show that the Cambrian sandstones in the SCB can be divided into three groups, and they have similar detrital zircon age spectra, cumulative proportion curves and & epsilon;Hf(t) values. The study suggests that there was little provenance variation throughout the SCB during the Early Paleozoic, and the SCB was located between Australia and India during the Cambrian-Ordovician, receiving sediment detritus from both regions.
Article
Multidisciplinary Sciences
Xianqing Jing, Zhenyu Yang, Ross N. Mitchell, Yabo Tong, Min Zhu, Bo Wan
Summary: This study reports a large and fast true polar wander event that occurred 450-440 million years ago and provides evidence based on paleomagnetic data and paleopoles from major continents. The study also suggests that this event can explain the migration of glacial centers and the mass extinction at the end of the Ordovician period.
NATURE COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
A. S. Tabaud, P. Stipska, S. Mazur, K. Schulmann, J. Mikova, J. Wong, M. Sun
Summary: The study of rocks samples from GSM in Poland, using geochemistry and isotopic data, revealed the origin and geological evolution of sedimentary rocks in the area, suggesting that it may have been located along the northern periphery of the Gondwana margin, forming in the middle to late Cambrian period.
Article
Geography, Physical
Li Qiao, Yi-Chun Zhang, Cong-Ying Liu
Summary: By studying the brachiopod faunas from different terranes in the Tibetan Plateau, it was found that there was an increasing trend of provinciality and endemicity in the Mississippian period. Additionally, the Longmu Co-Shuanghu suture zone was identified as an effective palaeobiogeographic barrier during this time.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Aram Bayet-Goll, Mahmoud Sharafi, Neda Jazimagh, Marco Brandano
Summary: This article discusses the changes in stacking patterns of facies, stratal architecture, and shoreline trajectory along depositional strike, which are mainly influenced by factors such as physical processes, tectonics, eustatic changes, sediment supply, and local physiography. The Lower-Upper Ordovician successions in a Peri-Gondwana shallow continental shelf were interpreted using sequence stratigraphic concepts, revealing significant differences along-strike in the co-existing depositional systems. The sedimentary units were divided into four facies associations based on their characteristics. Six depositional sequences were identified, each bounded by unconformities and shifts in facies. Changes in sediment supply and processes were the main controlling factors for stratigraphic architecture, while tectonic activity played a dominant role in later intervals.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Paleontology
Hai-peng Xu, Kyi Pyar Aung, Yi-chun Zhang, G. R. Shi, Fu-long Cai, Than Zaw, Lin Ding, Kyaing Sein, Shu-zhong Shen
Summary: This study reveals the geological ages of the brachiopod fauna in the Taungnyo Group in the Zwekabin Range of eastern Myanmar, and suggests that the Cisuralian brachiopod faunas in the Sibumasu Block should be divided into two separate assemblages, a cold-water fauna in the Sakmarian period and a biogeographically mixed fauna in the late Kungurian period.
JOURNAL OF PALEONTOLOGY
(2021)