Review
Geosciences, Multidisciplinary
Aneta Huskova, Ladislav Slavik
Summary: The research found that the P-1 elements of Zieglerodina paucidentata and Zieglerodina petrea share similar gaps in their denticulation, but the ambiguity in the diagnosis of Z. paucidentata may affect the recognition of the boundary. New geographic occurrences suggest that some specimens previously classified as Z. paucidentata or Z. cf. paucidentata might belong to other taxa, limiting their applicability for correlation of the Silurian-Devonian boundary.
BULLETIN OF GEOSCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Edward J. Matheson, Peir K. Pufahl
Summary: Ironstone is a marine biochemical sedimentary rock with syndepositional Fe enrichment, consisting of two distinct types: granular ironstone and fossiliferous ironstone. The formation process involves the precipitation and reduction of iron, and is related to the modern understanding of the Fe biogeochemical cycle and early Paleozoic Earth system.
EARTH-SCIENCE REVIEWS
(2021)
Article
Paleontology
Maria G. Corriga, Matteo Floris, Carlo Corradini
Summary: This study focuses on the ancient stratigraphy in the Perda S'altari area of southwestern Sardinia, Italy. Fossils of graptolites from the Late Ludlow and Silurian Rhandemian, as well as the problematic species Eurytholia bohemica, have been discovered in the black shales and Devonian limestones. The gradual transition between the lithostratigraphic units of the Silurian and Lower Devonian is also confirmed.
BOLLETTINO DELLA SOCIETA PALEONTOLOGICA ITALIANA
(2022)
Article
Geosciences, Multidisciplinary
Misha Whittingham, Andrej Spiridonov, Sigitas RadzeviCius
Summary: The research found that the counts of sicular annuli in monograptids fluctuated greatly over the Silurian period, but showed negligible variation between species, indicating that this trait is ecophenotypic. The presence of annuli fluctuated in alignment with variations in sea level fluctuations, delta C-13 ratios, and primary productivity, suggesting that annuli were more plentiful in high-stand states associated with wetter climates and more productive conditions. The hypothesis is that upwelling as a result of intensified storm events during wetter periods would have encouraged phytoplankton blooms, increasing the construction of annuli.
EARTH AND ENVIRONMENTAL SCIENCE TRANSACTIONS OF THE ROYAL SOCIETY OF EDINBURGH
(2022)
Article
Paleontology
Joerg Maletz, Chuanshang Wang, Xiaofeng Wang
Summary: The graptolite succession of the YD-1 drill core in the Yangtze platform of China provides insight into the lower Silurian biostratigraphy of the Yichang region, revealing gaps and the necessity for further modification and revision of the graptolite biostratigraphy. The study highlights the incomplete nature of the Llandovery in the eastern flank of the Huangling anticline and emphasizes the challenges in dating the biostratigraphically younger part of the succession accurately with graptolite faunas.
PAPERS IN PALAEONTOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Raimund Feist, Gilbert Klapper
Summary: This paper establishes the distribution ranges of late Givetian and Frasnian phacopid trilobites using Frasnian conodont zonation. It introduces new taxa and highlights the increase in diversity rates during the mid-and late Frasnian times.
BULLETIN OF GEOSCIENCES
(2022)
Article
Biodiversity Conservation
Jorg Maletz
Summary: The genus Paraplectograptus consists of a small number of retiolitine species that have the same development of the main thecal and ancora sleeve lists. The obverse side of the tubarium forms a complete development with connecting lists, while the reverse side only has lateral apertural lists connected through the pleural lists of the ancora sleeve. The reticular ancora sleeve lists on the obverse and reverse sides of the tubarium vary greatly in their development and extent.
PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS
(2023)
Article
Geosciences, Multidisciplinary
Andrew Simpson, David Mathieson, Jiri Fryda, Barbora Frydova
Summary: The Ireviken Event is the earliest recognized Middle Paleozoic event with synchronized faunal, isotopic, and facies changes. This study in New South Wales, Australia, reveals all five conodont zones comprising the event in the Boree Creek/Borenore Limestone succession. However, there are limitations in identifying conodont zones from pre-Ireviken Event strata and post-Ireviken Event Wenlock strata due to lithological variability.
JOURNAL OF EARTH SCIENCE
(2021)
Article
Biology
Hamed Ameri, Reza Arjmandzadeh, Khalil Ghoorcgi
Summary: This study describes and illustrates Silurian trilobites of the Niur Formation in the Robat-e-Gharebil area, identifying three genera and five species. The research suggests that the area was part of the peri-Gondwana supercontinent during the Early Silurian.
HISTORICAL BIOLOGY
(2021)
Review
Geosciences, Multidisciplinary
Jiri Fryda, Oliver Lehnert, Michael M. Joachimski, Peep Mannik, Michal Kubajko, Michal Mergl, Juraj Farkas, Barbora Frydova
Summary: This study reviews the significant perturbations in the Phanerozoic carbon cycle, particularly focusing on the Mid-Ludfordian Carbon Isotope Excursion (MLCIE) and its associated climate changes, marine temperature variations, and geological events. The research findings provide evidence for global cooling during the MLCIE, along with occurrences of climate cooling events, oceanic anoxic events, and extinctions, highlighting the complex interactions between carbon cycling, climatic shifts, and ecosystem disruptions during this period in the late Silurian.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Mansoureh Ghobadi Pour, Leonid E. Popov, J. Javier Alvaro, Arash Amini, Vachik Hairapetian, Hadi Jahangir
Summary: The litho-and biostratigraphic framework of the Alborz, Kopet-Dagh, and the East-Central Iranian blocks during the Ordovician period is outlined and updated in this study. The study identifies four tectono-stratigraphic units in northern Iran, each with varying lithology, facies, fossil record, and sedimentary record completeness. The Ordovician strata in the eastern Alborz and Kopet-Dagh Mountains are characterized by rifting volcanism within an active horst-and-graben palaeotopography. Biogeographical affinities with South China and the Mediterranean peri-Gondwana are noted, with zircon populations suggesting continental sources from the Arabian-Nubian Shield of the western Arabian Peninsula and northeastern Africa.
BULLETIN OF GEOSCIENCES
(2022)
Article
Paleontology
Sofia Pereira, Jorge Colmenar, Jan Mortier, Jan Vanmeirhaeghe, Jacques Verniers, Petr Storch, David Alexander Taylor Harper, Juan Carlos Gutierrez-Marco
Summary: This study describes the first macrofossiliferous Hirnantia Fauna assemblage found in Belgium, indicating a survival of this fauna into the Silurian period, possibly due to delayed post-glacial effects of rising temperature and sea-level. The assemblage shares characteristics with another known example from Rhuddanian rocks in England, suggesting a connection between these regions during the Late Ordovician-early Silurian.
JOURNAL OF PALEONTOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Yuri D. Zakharov, Liana G. Bondarenko, Alexander M. Popov, Olga P. Smyshlyaeva
Summary: Information on the latest early Olenekian (latest Smithian) ammonoids is primarily available from seven regions worldwide, including South Primorye. Evidence of the latest Smithian period is recorded in areas such as West SMID, East SMID, and Golyj Cape in South Primorye, providing additional data on systematic composition and assemblages within the Shimanskyites shimanskyi Zone.
JOURNAL OF EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Ming Li, Lixia Li, Wenhui Wang
Summary: Well-preserved graptolites of the genus Kiaerograptus are reported for the first time in the Nanba section, Yiyang, Hunan Province, South China. Based on these new specimens, the Kiaerograptus biozone is established for the first time in South China, which has significant implications for biostratigraphical correlation.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2023)
Article
Plant Sciences
Aicha Achab, Joerg Maletz
Summary: This study redefines the age of the Euconochitina symmetrica Zone found at the G locality in Levis and provides revisions on the correlation with the graptolite zones. It reveals that the age of E. symmetrica is different from what was initially suggested and gives a better positioning of the Lower Ordovician Laurentian chitinozoan zones on the Ordovician time scale.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2021)
Article
Geography, Physical
Petr Kraft, Josef Psenicka, Jakub Sakala, Jiri Fryda
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2019)
Article
Geography, Physical
Aneta Huskova, Ladislav Slavik
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2020)
Article
Geography, Physical
T. J. Suttner, E. Kido, Ya. Ariunchimeg, G. Sersmaa, J. A. Waters, S. K. Carmichael, C. J. Batchelor, M. Ariuntogos, A. Huskova, L. Slavik, J. I. Valenzuela-Rios, J. -C. Liao, Y. A. Gatovsky
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2020)
Article
Geography, Physical
Ladislav Slavik, Jindrich Hladil
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2020)
Article
Geography, Physical
Jiri Kalvoda, Tomas Kumpan, Wenkun Qie, Jiri Fryda, Ondrej Babek
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2019)
Article
Geography, Physical
Stepan Manda, Petr Storch, Jiri Fryda, Ladislav Slavik, Zuzana Tasaryova
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2019)
Article
Biodiversity Conservation
Gil Machado, Ladislav Slavik, Noel Moreira, Paulo Emanuel Fonseca
PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS
(2020)
Review
Biodiversity Conservation
Tomas Kumpan, Jiri Kalvoda, Ondrej Babek, Tomas Matys Grygar, Jiri Fryda
Summary: The well-accessible Devonian-Carboniferous boundary successions in the Czech Republic belong to the Brunovistulian Unit of the Variscan Rhenohercynian Zone within the Bohemian Massif. Detailed studies in the Moravian Karst area have revealed continuous carbonate sedimentation with distinctive features of carbonate turbidites and hemipelagic successions. In the Lesni lom quarry, a complete succession of conodont zones can be documented and correlated with coeval foraminiferal zones, providing insights into the Hangenberg Crisis and its phases.
PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS
(2021)
Article
Multidisciplinary Sciences
Richard G. Stockey, Devon B. Cole, Noah J. Planavsky, David K. Loydell, Jiri Fryda, Erik A. Sperling
NATURE COMMUNICATIONS
(2020)
Article
Geography, Physical
Hedvika Weinerova, Ondrej Babek, Ladislav Slavik, Hubert Vonhof, Michael M. Joachimski, Jindrich Hladil
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2020)
Review
Geosciences, Multidisciplinary
Aneta Huskova, Ladislav Slavik
Summary: The research found that the P-1 elements of Zieglerodina paucidentata and Zieglerodina petrea share similar gaps in their denticulation, but the ambiguity in the diagnosis of Z. paucidentata may affect the recognition of the boundary. New geographic occurrences suggest that some specimens previously classified as Z. paucidentata or Z. cf. paucidentata might belong to other taxa, limiting their applicability for correlation of the Silurian-Devonian boundary.
BULLETIN OF GEOSCIENCES
(2021)
Article
Geochemistry & Geophysics
Adam D. Sproson, Philip A. E. Pogge von Strandmann, David Selby, Emilia Jarochowska, Jiri Fryda, Jindrich Hladil, David K. Loydell, Ladislav Slavik, Mikael Calner, Georg Maier, Axel Munnecke, Timothy M. Lenton
Summary: The Ordovician period ended with the formation of extensive ice sheets in the Southern Hemisphere known as the Hirnantian glaciation, along with the second largest mass extinction in Earth's history. The following Silurian period was characterized by climatic instability and large carbon isotope perturbations associated with extinction events, the causes of which remain largely unknown. The study suggests that astronomical forcing of the marine organic carbon cycle triggered continent-wide glaciation and global cooling during the Silurian period.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Paleontology
Zongyuan Sun, Petr Storch, Junxuan Fan, Michael J. Melchin, Anna Suyarkova
Summary: The lower Aeronian graptolite species Rastrites longispinus longispinus Perner, R. approximatus Perner, R. peregrinus Barrande, R.? norilskensis Obut & Sobolevskaya, and Stavrites rossicus Obut & Sobolevskaya have been revised using material from China, the Czech Republic, Siberia, Canada and Spain, together with published data. A new biogeographical subspecies, Rastrites longispinus chenxui subsp. nov., is identified and is only found in China and Canada. Several junior synonyms are also recognized. The study supports the hypothesis of two graptolite palaeobiographical provinces in the early Aeronian and has significant implications for palaeogeographical interpretations.
PAPERS IN PALAEONTOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Annalisa Ferretti, Maria Giovanna Corriga, Ladislav Slavik, Carlo Corradini
Summary: This passage introduces the Global Stratotype Section and Point (GSSP) for the Silurian/Devonian boundary. The GSSP was formally placed in 1977 at Klonk, Czech Republic, based on the appearance of the graptolite Uncinatograptus uniformis uniformis. However, in carbonate facies where graptolites are rare or absent, the correlation of this boundary has been challenging. The first appearance of the conodont Caudicriodus hesperius is suggested as an additional biostratigraphic marker for the boundary.
Article
Paleontology
Jiri Fryda, Jan Ove R. Ebbestad, Barbora Frydova
PAPERS IN PALAEONTOLOGY
(2019)