Results 61 to 70 of about 1,851 (210)

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

, 2010
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, Evans, Jane A., Horak, Jana M., JANE A. EVANS   +3 more
core   +1 more source

Selective Recording of Tectonic Forcings in an Oligocene/Miocene Submarine Channel System: Insights From New Age Constraints and Sediment Volumes From the Austrian Northern Alpine Foreland Basin

Frontiers in Earth Science, 2019
Detailed characterization of variations in sediment architecture, flux, and transport processes in peri-orogenic basins offers insights into external climatic or tectonic forcings.
Julian Hülscher, Gero Fischer, Patrick Grunert, Gerald Auer, Anne Bernhardt   +4 more
doaj   +1 more source

Quantification of the Eocene–Oligocene transition in the Zagros Foreland Basin: Palaeogeographic control on sequence architecture and tectonic signal preservation

The Depositional Record, Volume 12, Issue 3, June 2026.
New bio‐sequence framework for the Eocene–Oligocene transition in Zagros. Geochemical data validate basin depth control on SB1 vs. SB2 boundaries. SEM‐EDS analyses confirm subaerial exposure versus continuous deposition. Sensitivity analysis quantifies sub‐10% uncertainty in stratigraphic interpretations. Resolves the Pyrenean orogeny's variable impact
Sahar Rokni, Vahid Ahmadi, Seyed Hamid Vaziri, Ali Aghanabati, Pooria Kianoush   +4 more
wiley   +1 more source

Trans-Atlantic application of the Baltic Middle and Upper Ordovician carbon isotope zonation [PDF]

Estonian Journal of Earth Sciences, 2015
Application of the recently introduced Baltic d13C isotope zonation to a composite North American Darriwilian through Hirnantian succession shows that in most intervals there is good trans-Atlantic agreement not only between the isotope zones but also ...
Stig M. Bergström, Matthew R. Saltzman, Stephen A. Leslie, Annalisa Ferretti, Seth A. Young   +4 more
doaj   +1 more source

Chemostratigraphy of the Jurassic System: applications, limitations and implications for palaeoceanography

Journal of the Geological Society, 2002
Current chemostratigraphical studies of the Jurassic System primarily involve the use of one sedimentary component (marine organic carbon), one divalent transition metal substituted in carbonate (manganese), and two isotopic tracers: strontium-isotope ratios ( 87 Sr/ 86 Sr) and carbon-isotope
Jenkyns, H, Jones, C, Gröcke, DR, Hesselbo, S, Parkinson, D   +4 more
openaire   +2 more sources

Geochemical and Seismic Constraints on the Role of Mud Diapirs in Petroleum Migration and Accumulation in the Recôncavo Basin, NE Brazil

Journal of Petroleum Geology, Volume 49, Issue 2, Page 433-447, April 2026.
ABSTRACT In the Recôncavo Basin, Northeast of Brazil, mud diapirs have been reported for decades, but their role within the basin's petroleum system remains poorly constrained. Here, we combine 2D seismic interpretation, field observations, and organic geochemical analyses of rocks and oil seeps to investigate the relationship between diapirism and ...
Cora Mattos, Egberto Pereira, Lucas Pinto Heckert Bastos, René Rodrigues   +3 more
wiley   +1 more source

The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden

, 2013
The late Katian, Late Ordovician Boda Limestone of Dalarna, Sweden contains a rich cephalopod assemblage. The assemblage consists of 61 species, in 31 genera, comprising almost all major Ordovician cephalopod orders.
Kröger, Björn, Kröger, Björn,, Kr\uf6ger, Bj\uf6rn, Björn Kröger   +3 more
core   +1 more source

Linking palaeo‐wildfire to depositional environmental and ecological dynamics of an Early–Middle Pennsylvanian fluvial‐tidal transition zone—Palynology and pyrolysis evidence

The Depositional Record, Volume 12, Issue 1, February 2026.
The Pennsylvanian landscape in the Forest City basin was characterised by low‐lying lycopod tree and fern swamp forests with persistently high groundwater tables and adjacent fluvial channel, floodplain and upland environments. The occurrence of abundant charcoal within a specific thin interval in the Cherokee Group indicates substantial wildfire ...
Dustin Northrup, Emily Finzel, Pierre Zippi, Kevin Bohacs   +3 more
wiley   +1 more source

Fluvial deposits of the Ahr river (western Germany) reveal recurring high‐magnitude flood events over the last 1,500 years

Earth Surface Processes and Landforms, Volume 51, Issue 1, January 2026.
Floods are one of the most critical environmental threats in Central Europe. We show the importance of geomorphological records from Ahr flood deposits for reconstructing past high‐magnitude flood events. Our chemolithostratigraphical analysis shows that centennial to millennial scale high‐energy flooding is not the exception but the rule in the Ahr ...
Christoph Zielhofer, Johannes Rabiger‐Völlmer, Henriette Westermann, Markus Lothar Fischer, Birgit Schneider, Susanne Lindauer, Azra Khosravichenar, Martin Bauch, Marco Pohle, Ulrike Werban   +9 more
wiley   +1 more source

Geochemistry of the Northern Paraná Continental Flood Basalt (PCFB) Province: implications for regional chemostratigraphy

, 2018
: The Paraná Continental Flood Basalt (PCFB) province is one of the largest igneous provinces on Earth, but little is known about the architecture and geochemical characteristics of the lava flows.
Fábio Braz Machado (5527697), Eduardo Reis Viana Rocha-Júnior (5527688), Natasha Sarde Marteleto (5527694), Leila Soares Marques (5527700), Larissa Vieira Zezzo (5527685), Antonio José Ranalli Nardy (5527691)   +5 more
core   +1 more source