Article
Geosciences, Multidisciplinary
Eseroghene J. Balota, Martin J. Head, Makoto Okada, Yusuke Suganuma, Yuki Haneda
Summary: The study of a dinoflagellate cyst record from the Chiba composite section in Japan provides insights into the sea-surface paleoceanographic changes during the Lower-Middle Pleistocene Subseries, revealing shifts in water masses and the Kuroshio Extension system. The research highlights the importance of microfossil analysis in understanding past marine environments and oceanographic dynamics in the Japanese Pacific margin during the Pleistocene.
PROGRESS IN EARTH AND PLANETARY SCIENCE
(2021)
Article
Geology
Samer Kenjo, Stephane Reboulet, Emanuela Mattioli, Kayed Ma'louleh
Summary: The Vergol locality in South-East France is a candidate section for the Valanginian GSSP, where a detailed study of ammonites and calcareous nannofossils was carried out to define the Berriasian-Valanginian boundary. The base of the Valanginian is defined by the First Appearance Datum of T. pertransiens, with a discussion proposed on the choice of primary marker for the Valanginian GSSP.
CRETACEOUS RESEARCH
(2021)
Article
Environmental Sciences
Michinobu Kuwae, Bruce P. Finney, Zhiyuan Shi, Aya Sakaguchi, Narumi Tsugeki, Takayuki Omori, Tetsuro Agusa, Yoshiaki Suzuki, Yusuke Yokoyama, Hirofumi Hinata, Yoshio Hatada, Jun Inoue, Kazumi Matsuoka, Misaki Shimada, Hikaru Takahara, Shin Takahashi, Daisuke Ueno, Atsuko Amano, Jun Tsutsumi, Masanobu Yamamoto, Keiji Takemura, Keitaro Yamada, Ken Ikehara, Tsuyoshi Haraguchi, Stephen Tims, Michaela Froehlich, Leslie Keith Fifield, Takahiro Aze, Kimikazu Sasa, Tsutomu Takahashi, Masumi Matsumura, Yukinori Tani, Peter R. Leavitt, Hideyuki Doi, Tomohisa Irino, Kazuyoshi Moriya, Akira Hayashida, Kotaro Hirose, Hidekazu Suzuki, Yoshiki Saito
Summary: By integrating datasets of 99 proxies, we assessed the potential of the Beppu Bay sediments as a candidate for the Global Boundaries Stratotype Section and Point (GSSP) of the Anthropocene. The cumulative number of anthropogenic fingerprints revealed unprecedented increases above the base of the 1953 flood layer. This site exhibits a range of evidence, including changes in carbon and nitrogen cycling, pollution of heavy metals, deposition of novel materials, occurrence of hypoxia and eutrophication, microplankton community changes, abnormal spring air temperatures, and lithological changes, indicating that the base of the 1953 layer is the best candidate for GSSP level.
ANTHROPOCENE REVIEW
(2022)
Article
Environmental Sciences
Yongming Han, Zhisheng An, Dewen Lei, Weijian Zhou, Luyuan Zhang, Xue Zhao, Dongna Yan, Richard Arimoto, Neil L. Rose, Sarah L. Roberts, Li Li, Yalan Tang, Xingqi Liu, Xuewu Fu, Tobias Schneider, Xiaolin Hou, Jianghu Lan, Liangcheng Tan, Xingxing Liu, Jing Hu, Yunning Cao, Weiguo Liu, Feng Wu, Tianli Wang, Xiaoke Qiang, Ning Chen, Peng Cheng, Yifei Hao, Qiyuan Wang, Guoqiang Chu, Meiling Guo, Mei Han, Zhihai Tan, Chong Wei, Ulrike Dusek
Summary: Sihailongwan Maar Lake in Northeast China is a potential candidate for the Global boundary Stratotype Section and Point (GSSP) of the Anthropocene. Its sediments provide a detailed chronology of environmental and human impacts, with a tipping point observed in the mid-20th century (1954 CE).
ANTHROPOCENE REVIEW
(2023)
Article
Multidisciplinary Sciences
E. N. Gorozhanina, E. Yu Bashlykova, E. Kulagina
Summary: This article provides a detailed lithofacies description of the Carboniferous carbonate deposits in the Sikasi River sections, identifying and describing five microfacies of limestones that developed under open-shelf conditions. The sequence of these microfacies indicates the alternation of sediments of currents and waves in the early Tulian time, followed by the gradual shallowing and formation of shallow-shelf conditions.
UCHENYE ZAPISKI KAZANSKOGO UNIVERSITETA-SERIYA ESTESTVENNYE NAUKI
(2021)
Article
Environmental Sciences
M. Allison Stegner, Elizabeth A. Hadly, Anthony D. Barnosky, SeanPaul La Selle, Brian Sherrod, R. Scott Anderson, Sergio A. Redondo, Maria C. Viteri, Karrie L. Weaver, Andrew B. Cundy, Pawel Gaca, Neil L. Rose, Handong Yang, Sarah L. Roberts, Irka Hajdas, Bryan A. Black, Trisha L. Spanbauer
Summary: Cores from Searsville Lake in Stanford University's Jasper Ridge Biological Preserve were examined to determine a potential GSSP for the Anthropocene. The primary marker identified was the first appearance of Pu-239, Pu-240, and the GSSP depth was designated as the distinct boundary between wet and dry seasons. Auxiliary markers include the first appearance of Cs-137 in 1958 and changes in various elements and microfossils. The site's importance lies in its use for research and education, its accessibility, and its protection for future studies and communication about the Anthropocene.
ANTHROPOCENE REVIEW
(2023)
Article
Environmental Sciences
Jerome Kaiser, Serena Abel, Helge W. Arz, Andrew B. Cundy, Olaf Dellwig, Pawel Gaca, Gunnar Gerdts, Irka Hajdas, Matthias Labrenz, James A. Milton, Matthias Moros, Sebastian Primpke, Sarah L. Roberts, Neil L. Rose, Simon D. Turner, Maren Voss, Juliana A. Ivar do Sul
Summary: The short sediment core EMB201/7-4 from the East Gotland Basin in the central Baltic Sea is examined as a potential candidate for the stratigraphical basis of the Anthropocene series and its equivalent epoch. Accurate dating back to 1840 CE using event stratigraphy reveals a significant change at 26.5 cm, indicated by various geochemical markers. This stratigraphic level, associated with early human-induced eutrophication in the central Baltic Sea, is proposed as a Global Boundary Stratotype Section and Point for the Anthropocene series.
ANTHROPOCENE REVIEW
(2022)
Article
Geology
Dong-xun Yuan, Shu-zhong Shen, Charles M. Henderson, Lance L. Lambert, Jonena M. Hearst, Yi-chun Zhang, Jun Chen, Wen-kun Qie, Hua Zhang, Xiang-dong Wang, Yu-ping Qi, Qiong Wu
Summary: The basal boundary of the Wordian Stage is defined by the FAD of Jinogondolella aserrata in West Texas, USA. The evolutionary lineage of conodont fauna is investigated, with the identification of new species. Chemostratigraphic data from the GSSP section, including carbon and strontium isotopes, are presented for the first time.
NEWSLETTERS ON STRATIGRAPHY
(2021)
Article
Geochemistry & Geophysics
Tatiana Petrovna Mayorova, Sergei Karpovich Kuznetsov, Ludmila Ivanovna Efanova, Natalia Vladimirovna Sokerina
Summary: This article discusses the characteristics of gold-sulfide-quartz and gold-sulfide ore occurrences in the Manitanyrd region of the Polar Urals. The ore occurrences are found in NE-trending shear zones and share common geological structures. The mineral and chemical composition analysis reveals that they belong to the same mineral type, pyrite-arsenopyrite, with variable ratios. The formation of these occurrences can be attributed to a single hydrothermal system.
Article
Environmental Sciences
Angel T. Bautista, Sophia Jobien M. Limlingan, Miwako Toya, Yasuto Miyake, Kazuho Horiuchi, Hiroyuki Matsuzaki, Yoshinori Iizuka
Summary: The Anthropocene is proposed to be a new geological epoch in which humans have irreversibly affected the Earth. The establishment of this epoch requires a Global Boundary Stratotype Section and Point, also known as a golden spike. The leading candidates for the Anthropocene's golden spike, 14C and 239Pu from nuclear weapons testing, may not be durable enough to be observable in the far future. However, the 129I record of the SE-Dome ice core is a more durable candidate for the golden spike due to its long half-life and its ability to reflect the entire history of the nuclear age.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Geography, Physical
Tea Kolar-Jurkovsek, Hazim Hrvatovic, Dunja Aljinovic, Galina P. Nestell, Bogdan Jurkovsek, Ferid Skopljak
Summary: This study examined the sedimentology and micropaleontology of the Teoc?ak section in Bosnia and Herzegovina, revealing the presence of Permian and Triassic strata in the region. The findings include insights into the depositional environment, conodont faunas, and proposed conodont biozonation, which contributes significantly to the paleobiogeographic correlation of the Western Tethys region.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geosciences, Multidisciplinary
Alcides Nobrega Sial, Jiubin Chen, Christoph Korte, Manoj Kumar Pandit, Jorge E. Spangenberg, Juan Carlos Silva-Tamayo, Luiz Drude de Lacerda, Valderez Pinto Ferreira, Jose Antonio Barbosa, Claudio Gaucher, Natan Silva Pereira, Paulo Ricardo Riedel
Summary: The study presents high-resolution organic carbon isotope, Hg concentration, and Hg isotope curves at the PTB sections in India and China. The Hg/TOC spikes observed coincide with major environmental and carbon isotope changes. Analysis of redox-sensitive elements reveals variations in Hg/TOC spikes under different paleoredox conditions. The study highlights the significance of Hg/TOC ratios as a paleoenvironmental proxy and a tool for stratigraphic correlation.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Wenbo Zhou, Valeriy Mazepa, Stepan Shiyatov, Tianqi Zhang, Desheng Liu, Aleksey Sheshukov, Jingfeng Wang, Husayn El Sharif, Ivanov Valeriy, Yulia Shalaumova
Summary: This study reveals that the expansion of Siberian larch into the tundra of the Polar Urals is spatially heterogeneous and influenced by environmental factors such as topography and snow cover. Trees tend to cluster in areas with convex surfaces and their locations are linked to snow distribution. As the climate warms, trees have expanded uphill and high snow depth areas have shifted upward, creating favorable conditions for recent tree growth.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Forestry
Olga Nekrasova, Tatiana Radchenko, Anna Betekhtina, Tatiana Petrova, Anton Uchaev, Maria Dergacheva
Summary: The purpose of this article was to assess the participation of young soils of ash dump forest communities in carbon sequestration by soils of southern taiga forests, considering the physico-chemical properties of the ash substrate and forest litter. The study revealed that the carbon stocks in the technosols of ash dump forest communities are two times less than the carbon stocks in the zonal forest soils of the Middle Ural southern taiga.
Article
Geosciences, Multidisciplinary
Natalia M. Levashova, Inessa Golovanova, D. Rudko, Konstantin N. Danukalov, S. Rudko, Salmanova R. Yu, Joseph G. Meert
Summary: Recent studies suggest that the Late Ediacaran to Early Cambrian magnetic field was in a hyperactive reversing state, with a reversal frequency estimated at 20 times per million years. This has important implications for understanding plate reconstructions, inner core characteristics, and biological evolution.