Article
Geography, Physical
Imre Magyar
Summary: Clinoforms and clinothems play a significant role in the sedimentary record of basins worldwide and can impact chronostratigraphic interpretations. In non-marine basins like the Neogene Paratethyan basins, fossils of environmentally sensitive molluscs are used for chronostratigraphic division and correlation. However, in subsurface settings, the boundaries between clinoforms can lead to confusion in chronostratigraphy. Additionally, dating uncertainties remain high for certain time intervals in the late Neogene and Pliocene.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geology
Zuohuan Qin, Dangpeng Xi, Benjamin Sames, Feimin Ma, Yunqi Ye, Baoxu Wu, Xuejiao Wang, Muhammad Kamran, Xiaoqiao Wan
Summary: This study reports on the ostracods from the non-marine strata of Lower Cretaceous age in western Liaoning and northern Hebei, North China, confirming the stratigraphic correlation of the Liying section to be member 1 of the Xiguayuan Formation. The ostracods identified in this section support this correlation and indicate a comparison with the Yixian Formation in western Liaoning.
CRETACEOUS RESEARCH
(2021)
Article
Geography, Physical
Aitor Payros, Naroa Martinez-Braceras, Jaume Dinares-Turell, Gilen Bernaola, Simonetta Monechi
Summary: Biomagnetostratigraphic studies at the Gorrondatxe section have provided a solution to chronostratigraphic calibration discrepancies and defined the GSSP for the Lutetian Stage. However, doubts were raised about the reliability of the biomagnetostratigraphic data, and a new analysis was conducted to address the concerns. The results confirm the reliability of the Gorrondatxe biomagnetostratigraphy and provide an accurate age model for the Lutetian Stage.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geochemistry & Geophysics
Rui Zhang, Vadim A. Kravchinsky, Jie Qin, Avto Goguitchaichvili, Jianxing Li
Summary: The study indicates that in the middle Eocene, aridification in the Altun Shan is associated with a cooling event in the global oxygen isotope record, a sea surface temperature record on the east Tasmanian plateau, and an aridity record in the surrounding sedimentary basins of Central Asia.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geography, Physical
Alan L. Deino, Clifford Heil, John King, Lindsay J. McHenry, Ian G. Stanistreet, Harald Stollhofen, Jackson K. Njau, Joshua Mwankunda, Kathy D. Schick, Nicholas Toth
Summary: The Olduvai Gorge Coring Project in Tanzania drilled cores at three sites in the Olduvai Basin, developing a chronostratigraphic framework. Through dating, paleomagnetic stratigraphy, and tephrochemical correlation, they obtained realistic age estimates. The age models revealed varying sedimentation rates in the basin's history and provided new estimates for the basal contacts of upper stratigraphic units in Olduvai Gorge.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Charlotte Lauchli, Miguel Garces, Elisabet Beamud, Luis Valero, Louis Honegger, Thierry Adatte, Jorge E. Spangenberg, Julian Clark, Cai Puigdefabregas, Andrea Fildani, Eric de Kaenel, Teodoro Hunger, Andres Nowak, Sebastien Castelltort
Summary: The stratigraphic cycles in the deep marine deposits of the southern central Pyrenees, Spain, are influenced by tectonics, climate, sea-level variations, and sediment supply. By using a combination of geochemical datasets and a new age model, the study discusses the possible drivers of these cycles in the sediment gravity flow deposits.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geology
Zhongshan Shen, Zhiqiang Yu, Hanqing Ye, Chenglong Deng, Huaiyu He
Summary: An integrated chronology for the non-marine Upper Cretaceous Nenjiang Formation in the Songliao Basin, China, was developed using high-resolution magnetostratigraphy and SIMS U-Pb zircon analyses. The study revealed the coexistence of pseudo-single-domain magnetite and single-domain greigite in the lacustrine black shales of the Nenjiang Formation. Stratigraphic correlation of borehole and outcrop sections was achieved through lithostratigraphy, biostratigraphy, and SIMS U-Pb zircon geochronology.
CRETACEOUS RESEARCH
(2022)
Article
Geography, Physical
Serena Perini, Giovanni Muttoni, Edoardo Monesi, Rita T. Melis, Margherita Mussi
Summary: The new magnetostratigraphic results from Melka Kunture sedimentary sequence in Ethiopia provide a temporal framework for human presence in the region during the Pleistocene. By integrating paleomagnetism with 40Ar/39Ar dating, reliable age models were generated to estimate the ages of archaeological levels within the sequence, ranging from approximately 0.6 Ma to 2.1 Ma, representing a significant and prolonged record of human presence in Africa.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Jennifer Pickering, Natasha Morris, Brian Driskill, Neal Auchter, Dallin Laycock
Summary: The study focuses on the regional stratigraphic correlation facilitated by altered volcanic ash preserved as bentonite clay within sedimentary depositional units. A particular bentonite ash bed, identified at a distinct stratigraphic position, is shown to have originated from the same volcanic center based on geochemical analyses and petrophysical correlations. This discovery has implications for regional chronostratigraphic correlation in Late Paleozoic western equatorial Pangea.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Multidisciplinary Sciences
Fei Han, Qiang Wang, Huapei Wang, Xufeng Zhu, Xinying Zhou, Zhixiang Wang, Kaiyong Fang, Thomas A. Stidham, Wei Wang, Xiaolin Wang, Xiaoqiang Li, Huafeng Qin, Longgang Fan, Chen Wen, Jianhong Luo, Yongxin Pan, Chenglong Deng
Summary: This study establishes a high-resolution geochronological framework for the Late Cretaceous sedimentary sequence in the Shanyang Basin of central China and finds evidence of a long-term decline in global dinosaur biodiversity prior to 66 million years ago, which likely set the stage for the end-Cretaceous nonavian dinosaur mass extinction.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geosciences, Multidisciplinary
Andrzej Wierzbowski, Marcin Barski, Angela L. Coe, Mark W. Hounslow, Bronislaw A. Matyja, Gregory D. Price, Hubert Wierzbowski, John K. Wright, Jacek Grabowski, Emanuela Mattioli, Nicol Morton, James G. Ogg, Federico Oloriz, Kevin Page, Horacio Parent, Piotr Przybylski, Guenter Schweigert, Anna Bertha Villasenor
Summary: Following the voting and ratification process, the Global Stratotype Section and Point (GSSP) for the base of the Kimmeridgian Stage in the Jurassic System has been approved. The GSSP is located in the upper part of Bed 35 of the Staffin Shale Formation, Flodigarry, Isle of Skye, Scotland. The presence of well-preserved and abundant ammonite groups, along with additional markers such as dinoflagellate cysts and stable isotope data, contributes to the significance of this stratigraphic point.
Article
Geochemistry & Geophysics
Ziaul Haque, John W. Geissman, Randall B. Irmis, Paul E. Olsen, Christopher Lepre, Hesham Buhedma, Roland Mundil, William G. Parker, Cornelia Rasmussen, George E. Gehrels
Summary: The Colorado Plateau Coring Project Phase 1 obtained three continuous drill cores from Petrified Forest National Park in Arizona, two of which intersected various geological formations. A high-resolution magnetostratigraphy was constructed for the Moenkopi Formation, revealing six normal and six reverse polarity magnetozones in both cores. Chemical dating suggests that the Moenkopi Formation spans from the earliest Anisian to the earliest Ladinian stages.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geology
Damian Gerard Lodowski, Andrzej Pszczolkowski, Ottilia Szives, Istvan Fozy, Jacek Grabowski
Summary: A high-resolution stratigraphic calibration was conducted on Upper Jurassic-Lower Cretaceous sedimentary successions in the Bakony Mountains, revealing stratigraphic discontinuities and identifying boundaries between different lithostratigraphic units.
NEWSLETTERS ON STRATIGRAPHY
(2022)
Article
Geology
Robert W. SCOTT
Summary: New radioisotopic dates have significantly recalibrated the numerical ages of Early Cretaceous strata in the Neuquen Basin. This recalibration is important for understanding the temporal framework of the region's geology.
CARNETS DE GEOLOGIE
(2022)
Article
Geochemistry & Geophysics
Shuja Ullah, Irfan U. Jan, Muhammad Hanif, Khalid Latif, Mohibullah Mohibullah, Mahnoor Sabba, Aqsa Anees, Umar Ashraf, Hung Vo Thanh
Summary: The Cretaceous Goru Formation in the Chutair Section of the Sulaiman Range was studied for its paleoenvironment and bio-sequence stratigraphy. Eight planktonic foraminiferal biozones and five microfacies were identified. The study also revealed the presence of second and third order cycles and their corresponding transgressive and regressive system tracts. The sea level curve of the Goru Formation showed fluctuations between outer-ramp and deep-basin settings, with the third order cycle influenced by local tectonic control.