Results 61 to 70 of about 6,689 (261)

A composite C-isotope profile for the Neoproterozoic Dalradian Supergroup of Scotland and Ireland [PDF]

, 2009
The Neoproterozoic Dalradian Supergroup is a dominantly siliciclastic metasedimentary succession in the Caledonian orogenic belt of Scotland and Ireland.
Fallick, A.E., Graham, C.M., Prave, A.R., Thomas, C.W.   +3 more
core   +1 more source

Confirmation of the impact origin of the Late Ordovician Tvären impact structure (southeast Sweden) and emplacement of impactites in a marine setting

Meteoritics &Planetary Science, EarlyView.
Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska, Sanna Alwmark, Mikael Calner, Sylvain Richoz, Jens Ormö, Erik Sturkell, Carl Alwmark   +6 more
wiley   +1 more source

New Geochronological Age Constraint and Chemostratigraphy for Aptian Lacustrine Strata, Cedar Mountain Formation, Utah

Geochemistry, Geophysics, Geosystems, 2023
The Early Cretaceous is an important time of transition in Earth history, marked by a succession of oceanic anoxic events and carbon cycle perturbations that drove changes on land and in the ocean.
Marina B. Suarez, Aisha Al Suwaidi, Elizabeth H. Montgomery, James I. Kirkland, Joe Andrew, Noah Mclean, Andreas Möller, Gregory Ludvigson, Celina A. Suarez   +8 more
doaj   +1 more source

⁸⁷Sr/⁸⁶Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland: constraints on depositional ages and time scales [PDF]

, 2004
New calcite ⁸⁷Sr/⁸⁶Sr data for 47 limestones from the metamorphosed and deformed Neoproterozoic-Cambrian Dalradian Supergroup of Scotland and Ireland are used to identify secular trends in seawater <sup>
Ellam, R.M., Fallick, A.E., Graham, C.M., Thomas, C.W.   +3 more
core   +1 more source

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

Mercury Anomalies Link to Extensive Volcanism Across the Late Devonian Frasnian–Famennian Boundary in South China

Frontiers in Earth Science, 2021
The Late Devonian Frasnian–Famennian (F–F) mass extinction has been long-time debated by non-volcanic causes, extra-terrestrial impacts, and large igneous province (LIP) eruptions.
Jiawei Zhang, Jiawei Zhang, Changzhou Deng, Weipeng Liu, Zuoqi Tang, Yue Wang, Taiping Ye, Weian Liang, Lingyun Liu   +8 more
doaj   +1 more source

Sedimentation and subsidence history of the Lomonosov Ridge [PDF]

, 2006
During the first scientific ocean drilling expedition to the Arctic Ocean (Arctic Coring Expedition [ACEX]; Integrated Ocean Drilling Program Expedition 302), four sites were drilled and cored atop the central part of the Lomonosov Ridge in the Arctic ...
Backman, J., Brinkhuis, H., Clemens, S., Cronin, T., Dickens, G.R., Eynaud, F., Gattacceca, J., Jakobsson, M., Jordan, R.W., Kaminski, M., King, J., Koç, N., Martinez, N.C., Matthiessen, J., McInroy, D., Moore Jr., T.C., Moore, T.C., Moran, K., O'Regan, M., Onodera, J., Pälike, H., Rea, B., Rio, D., Sakamoto, T., Smith, D.C., St. John, K.E.K., Stein, R., Suto, I., Suzuki, N., Takahashi, K., Watanabe, M., Yamamoto, M.   +31 more
core   +3 more sources

Earthquake slip surfaces identified by biomarker thermal maturity within the 2011 Tohoku-Oki earthquake fault zone. [PDF]

, 2020
Extreme slip at shallow depths on subduction zone faults is a primary contributor to tsunami generation by earthquakes. Improving earthquake and tsunami risk assessment requires understanding the material and structural conditions that favor earthquake ...
Kirkpatrick, James D, Polissar, Pratigya J, Rabinowitz, Hannah S, Rowe, Christie D, Savage, Heather M   +4 more
core  

Correlations of some Neoproterozoic carbonate-dominated successions in South America based on high-resolution chemostratigraphy [PDF]

, 2016
Esta revisão incorpora novos dados isotópicos e químicos para correlação quimioestratigráfica de sucessões, predominantemente carbonáticas, na América do Sul (Argentina, Bolívia, Brasil, Paraguai e Uruguai).
Alvarenga, Carlos José Souza de, Boggiani, Paulo Cesar, Cezario, Wilker dos Santos, Chiglino, Leticia, Fernández Ramírez, Rodrigo, Ferreira, Valderez Pinto, Gaucher, Claudio, Geraldes, Mauro, Misi, Aroldo, Pedreira, José Augusto, Pereira, Natan Silva, Pimentel, Marcio Martins, Sial, Alcides Nobrega, Warren, Lucas Verissimo   +13 more
core   +2 more sources

Local and Global Controls on Carbon Isotope Chemostratigraphy

, 2022
Over million-year timescales, the geologic cycling of carbon controls long-term climate and the oxidation of Earth's surface. Inferences about the carbon cycle can be made from time series of carbon isotopic ratios measured from sedimentary rocks. The foundational assumption for carbon isotope chemostratigraphy is that carbon isotope values reflect ...
Anne-Sofie Ahm, Jon Husson
openaire   +3 more sources