Results 51 to 60 of about 2,191 (193)

Middle Phanerozoic mass extinctions and a tribute to the work of Professor Tony Hallam [PDF]

, 2016
Tony Hallam's contributions to mass extinction studies span more than 50 years and this thematic issue provides an opportunity to pay tribute to the many pioneering contributions he has made to this field.
Bachan, BAS VAN DE SCHOOTBRUGGE, Hallam, Hallam, Hallam, Hofman, PAUL B. WIGNALL, Pálfy, Song, Toljagić, Wignall, Wignall   +11 more
core   +2 more sources

Pliensbachian–Toarcian ostracod biogeography in NW Europe: Evidence for water mass structure evolution [PDF]

, 2007
This paper examines the role played by palaeoceanographic and climatic conditions on the palaeobiogeography of the Pliensbachian–Toarcian ostracods (Early Jurassic) in the European Epicontinental Sea (EES).
Arias Fernández, María del Carmen
core   +2 more sources

CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY AND PALEOCEANOGRAPHY OF THE TOARCIAN OCEANIC ANOXIC EVENT AT COLLE DI SOGNO (SOUTHERN ALPS, NORTHERN ITALY)

Rivista Italiana di Paleontologia e Stratigrafia, 2015
We present calcareous nannofossil biostratigraphy and abundances for the Upper Pliensbachian-Lower Toarcian interval, including the Toarcian Oceanic Anoxic Event (T-OAE), represented by the Fish Level at Colle di Sogno (N Italy).
CRISTINA EMANUELA CASELLATO, ELISABETTA ERBA   +1 more
doaj   +1 more source

Geology and Jurassic paleogeography of the Mt. Primo-Mt. Castel Santa Maria ridge and neighbouring areas (Northern Apennines, Italy) [PDF]

, 2014
This paper presents the results of a geological mapping project across the Mt. Primo ridge and neighbouring areas (Umbria-Marche Domain – Northern Apennines), where a thick Meso-Cenozoic carbonate succession is exposed.
Fabbi, Simone
core   +2 more sources

Low durophagous predation on Toarcian (Early Jurassic) ammonoids in the northwestern Panthalassa shelf basin [PDF]

Acta Palaeontologica Polonica, 2015
Predatory shell breakage is known to occur occasionally on the ventrolateral portion of the body chamber in Mesozoic ammonoids. Here we report, for the first time, quantitative data of shell breakage in large ammonoid samples that were recovered from the
Yusuke Takeda, Kazushige Tanabe
doaj   +1 more source

Seawater temperature and carbon isotope variations in belemnites linked to mass extinction during the Toarcian (Early Jurassic) in Central and Northern Spain. Comparison with other European sections [PDF]

, 2008
The Early Toarcian mass extinction marks one of the critical events in the history of the Earth. Many of these events have been linked to important climate changes. Two sections of the Toarcian showing high-resolution ammonite-based biostratigraphy are
Canales Fernández, María Luisa, Goy, Antonio, Gómez Fernández, Juan José   +2 more
core   +1 more source

Upper ocean oxygenation dynamics from I/Ca ratios during the Cenomanian-Turonian OAE 2 [PDF]

, 2015
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution.
Adams, Alegret, Andy Ridgwell, Arthur, Arthur, Barclay, Bentum, Bluhm, Blättler, Bradley B. Sageman, Bralower, Broecker, Broecker, Brumsack, Campos, Campos, Chance, Chance, Christopher K. Junium, Dalton S. Hardisty, Du Vivier, Edwards, Eldrett, Elrick, Erba, Erbacher, Erbacher, Farrenkopf, Farrenkopf, Forster, Forster, Friedrich, Frijia, Gale, Gale, Gill, Hardisty, Harris, Hart, Hasegawa, Helmond, Hetzel, Higgins, Hugh C. Jenkyns, Jarvis, Jenkyns, Jenkyns, Jenkyns, Jeremy D. Owens, Jones, Joo, Kauffman, Keller, Kennedy, Kennedy, Kolonic, Kuroda, Kuypers, Little, Loope, Lu, Luther, Luther, Meyers, Monteiro, Montoya-Pino, Ogg, Ogg, Ohkouchi, Orth, Owens, Pancost, Parente, Paytan, Pearce, Pogge von Strandmann, Ridgwell, Rue, Sageman, Sageman, Schlanger, Schlanger, Schnetger, Scopelliti, Scopelliti, Sinninghe Damsté, Snow, Staudt, Takashima, Tian, Timothy W. Lyons, Topper, Tribovillard, Tsikos, Turgeon, Turgeon, Waite, Walker, Weissert, Westermann, Wignall, Wong, Wong, Wong, Xiaoli Zhou, Xin-Yuan Zheng, Zheng, Zhou, Zunli Lu   +108 more
core   +3 more sources

Chemostratigraphy of the Toarcian oceanic anoxic event from the Ionian Zone, Greece

Bulletin of the Geological Society of Greece, 2017
A global perturbation in the carbon cycle has been recorded in the Early Toarcian (~ 183 Ma) and is marked by enhanced organic-carbon burial and mass extinction. It is also associated with high palaeotemperatures, both positive and negative excursions in carbon-isotope ratios, and the development of anoxic to euxinic conditions in marine environments ...
Kafousia, N., Karakitsios, V., Mattioli, E., Jenkyns, H.C.   +3 more
openaire   +3 more sources

Disparity between Toarcian Oceanic Anoxic Event and Toarcian carbon isotope excursion

International Journal of Earth Sciences
AbstractThe Toarcian Oceanic Anoxic Event (T-OAE, Early Jurassic) is marked by widespread marine deoxygenation and deposition of organic carbon (OC)-rich strata. The genesis of the T-OAE is thought to be associated with environmental changes caused by the emission of 12C-enriched greenhouse gasses (CO2, CH4), manifested in a negative Toarcian carbon ...
Wolfgang Ruebsam, Lorenz Schwark
openaire   +1 more source

Hydrothermal source and upwelling-related sedimentary accumulation: A new model for early-stage ore forming processes of the western Neotethyan lower Jurassic Úrkút manganese ore deposit

Geosystems and Geoenvironment
The black shale-hosted manganese ore deposit of Úrkút in Hungary formed during the globally recognized Toarcian (Early Jurassic) Jenkyns Event. Although geochemical signatures of hydrothermal processes involved in the metallogenesis of manganese ores ...
Máté Zs. Leskó, Boglárka A. Topa, Ferenc Móricz, Ferenc Kristály, Délia H. Debus-Bulátkó, Richárd Z. Papp, Tamás G. Weiszburg, József Pálfy, Tamás Vigh, Péter Majoros, Lívia Leskóné Majoros, Norbert Zajzon   +11 more
doaj   +1 more source