Results 31 to 40 of about 8,217 (293)

Early Neoproterozoic limestones from the Gwna Group, Anglesey [PDF]

, 1998
Limestone megaclasts up to hundreds of metres in size are present within the Gwna Group mélange, North Wales, UK. The mélange has been interpreted as part of a Peri-Gondwanan fore-arc accretionary complex although the age of deposition remains ...
JANA M. HORÁK, JANE A. EVANS, O'Brian, Blatt, Matthew, Shackleton, Dickin, Gibbons, Denison, McCausland, Montañez, Schuster, Shackleton, Shields, Walter, White, Wood   +16 more
core   +4 more sources

Hg Isotopes and Enhanced Hg Concentration in the Meishan and Guryul Ravine Successions: Proxies for Volcanism Across the Permian-Triassic Boundary

Frontiers in Earth Science, 2021
High-resolution organic carbon isotope (δ13C), Hg concentration and Hg isotopes curves are presented for the Permian-Triassic boundary (PTB) sections at Guryul Ravine (India) and Meishan D (China).
Alcides Nóbrega Sial, Jiubin Chen, Christoph Korte, Manoj Kumar Pandit, Jorge E. Spangenberg, Juan Carlos Silva-Tamayo, Luiz Drude de Lacerda, Valderez Pinto Ferreira, José Antônio Barbosa, Claudio Gaucher, Natan Silva Pereira, Paulo Ricardo Riedel   +11 more
doaj   +1 more source

Palaeoenvironmental and diagenetic reconstruction of a closed-lacustrine carbonate system - the challenging marginal setting of the Miocene Ries Crater Lake (Germany) [PDF]

, 2017
Chemostratigraphic studies on lacustrine sedimentary sequences provide essential insights on past cyclic climatic events, on their repetition and prediction through time.
Abdul Aziz, Allan, Allan, Alonso-Zarza, Anadon, Anadón, Anderson, Andrews, Arp, Arp, Arp, Arp, Barnaby, Beier, Benito, Bennett, Brand, Buchner, Buchner, Budd, Böhme, Böhme, Börner, Chamberlain, Christ, Christ, Danielopol, Decrouy, Depeche, Dickson, Dravis, Dwyer, Einsele, Emrich, Flügel, Gentner, Gierlowski-Kordesch, Godet, Goldstein, Gouramanis, Grafenstein, Gray, Halley, Hays, Heaton, Holmes, Immenhauser, Immenhauser, Jankowski, Janz, Janz, Joachimski, Junge, Keatings, Kontrovitz, Kooij, Kwiecien, Leng, Leng, Li, Li, Lohmann, Lohmann, Mangili, Mangili, Marshall, Marshall, Mayr, Mazzini, Melezhik, Mischke, Mutti, Niemann, Oehlerich, Orszag-Sperber, Pache, Pohl, Prieto, Richter, Richter, Riding, Romanek, Rothe, Sanz, Schwarz, Sheppard, Stansell, Staudacher, Stevens, Swart, Talbot, Tütken, Vasconcelos, Wilson, Wittkop, Xia   +95 more
core   +1 more source

The Nitrogen Cycle in an Epeiric Sea in the Core of Gondwana Supercontinent: A Study on the Ediacaran-Cambrian Bambuí Group, East-central Brazil

Frontiers in Earth Science, 2021
The Ediacaran-Cambrian transition is marked by the diversification of metazoans in the marine realm. However, this is not recorded by the Ediacaran-Cambrian Bambuí Group of the São Francisco basin, Brazil. Containing the sedimentary record of a partially
Paula Luiza Fraga-Ferreira, Magali Ader, Sérgio Caetano-Filho, Pierre Sansjofre, Gustavo Macedo Paula-Santos, Marly Babinski, Cristian Guacaneme, Carolina Bedoya-Rueda, Virginia Rojas, Humberto L. S. Reis, Matheus Kuchenbecker, Ricardo I. F. Trindade   +11 more
doaj   +1 more source

Sequence stratigraphy, chemostratigraphy and facies analysis of Cambrian Series 2 – Series 3 boundary strata in northwestern Scotland [PDF]

, 2016
Globally, the Series 2 – Series 3 boundary of the Cambrian System coincides with a major carbon isotope excursion, sea-level changes and trilobite extinctions.
Faggetter, Luke, FAGGETTER, LUKE E., Joachimski, Michael, JOACHIMSKI, MICHAEL M., NEWTON, ROBERT J., Pruss, Sara, PRUSS, SARA B., Raine, Robert, RAINE, ROBERT J., Smith, Paul, SMITH, PAUL M., SUN, YADONG, WIDDOWSON, MIKE, Wignall, P B, WIGNALL, PAUL B.   +14 more
core   +1 more source

The Steptoean Positive Carbon Isotope Excursion (SPICE), inorganic aragonite precipitation and sea water chemistry: Insights from the Middle–Late Cambrian Port au Port Group, Newfoundland

The Depositional Record, 2022
The Late Cambrian Steptoean Positive Carbon Isotope Excursion marks a time of significant change in ocean chemistry and trilobite faunas. On the lead up to the carbon isotope excursion and at the excursion itself, there is global evidence from Laurentia ...
Joyce E. Neilson, Rosalia Barili, Alexander Brasier, Luiz F. De Ros, Sarah Ledingham   +4 more
doaj   +1 more source

AGE CONSTRAINTS AND SOURCE AREAS FOR THE PRECAMBRIAN TO CAMBRIAN STRATA OF THE SOUTHERN YENISEI RIDGE (REDKOLESNAYA AND OSTROVNOY FORMATIONS)

Геодинамика и тектонофизика, 2023
The Precambrian to Cambrian strata at the southwestern margin of the Siberian Platform are ubiquitously characterized by a gradual transition from red-colored alluvial and deltaic deposits to shallow-marine carbonates, reflecting a transgressive infill ...
V. V. Marusin, B. B. Kochnev, G. A. Karlova, A. I. Proshenkin   +3 more
doaj   +1 more source

A Cenozoic-style scenario for the end-Ordovician glaciation [PDF]

, 2014
The end-Ordovician was an enigmatic interval in the Phanerozoic, known for massive glaciation potentially at elevated CO2 levels, biogeochemical cycle disruptions recorded as large isotope anomalies and a devastating extinction event.
Achab, A, Asselin, E, Dabard, MP, Desrochers, A, Farley, C, Ghienne, JF, LOI, ALFREDO, Paris, F, Vandenbroucke, TRA, Veizer, J., Wickson, S   +10 more
core   +7 more sources

Using elemental chemostratigraphy on Mid-Late Frasnian platform-top successions from the Lennard Shelf outcrops, Canning Basin, Western Australia. [PDF]

, 2017
High-resolution chronostratigraphic correlation using elemental chemostratigraphy in platform carbonates is typically difficult to achieve. Here, elemental chemostratigraphy is used to correlate between two platform-top, carbonate-dominated field ...
Caulfield-Kerney, Samuel, Haines, Peter W, Hocking, Roger M, Kirschvink, Joseph, Montgomery, Paul, Playton, Ted E., Ratcliffe, Kenneth, Tohver, Eric, Wray, David, Yan, Maodu   +9 more
core   +1 more source

A Bayesian Approach to Inferring Depositional Ages Applied to a Late Tonian Reference Section in Svalbard

Frontiers in Earth Science, 2022
Increasing application of high precision uranium-lead (U-Pb) and rhenium-osmium (Re-Os) geochronology to the ancient geological record has resulted in massive improvement in age control and calibration of key Proterozoic stratigraphic successions and ...
Galen P. Halverson, Chen Shen, Joshua H. F. L. Davies, Lei Wu   +3 more
doaj   +1 more source