Results 71 to 80 of about 1,853 (212)

Thorncliffe Formation: A proglacial to subglacial lacustrine basin sequence, Greater Toronto Region, Canada

Boreas, Volume 55, Issue 3, Page 717-750, July 2026.
Map of Lower sediment (LS) thickness is a surrogate for the distribution of Thorncliffe Formation (TF) and ~75% of TF thickness from the slope of Niagara Escarpment east to Brighton. Inset images show the LS sequence at the Don Valleys brickyards (DVBY) and undeformed TF sand and gravel (~15 m) below Newmarket Till (NT) at sites L and Co.
David R. Sharpe, Charles E. Logan, Ross D. Knight, Andre J.‐M. Pugin   +3 more
wiley   +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, Volume 61, Issue 7, Page 1188-1212, July 2026.
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

Chemostratigraphy of the Lower Cretaceous Basal Quartz in Southern Alberta [PDF]

, 2002
The Lower Cretaceous Basal Quartz (BQ) of the Western Canadian Sedimentary Basin (WCSB) is the basal part of the Lower Mannville Formation, which, together with the overlying Upper Mannville, is considered one of the most prolific hydrocarbon- bearing ...
K.T. Radcliffe, A.M. Wright, B.A. Zaitlin, D.S. Wray   +3 more
core   +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

Katian (Upper Ordovician) carbon isotope chemostratigraphy in the Neixiang area, central China:Implications for intercontinental correlation [PDF]

, 2019
The Katian (Upper Ordovician) Shiyanhe Formation at the Sigang section, Neixiang area, Henan Province, central China, has been investigated for carbon isotope (? 13 C carb ) chemostratigraphy.
Jing, Xiuchun, Tian, Yufeng, Stouge, Svend, Wang, Xunlian, Zhou, Hongrui   +4 more
core   +1 more source

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

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., Fallick, A.E., Prave, Tony, Graham, C.M., Thomas, C. W., Graham, C. M., Prave, A.R., Thomas, Christopher, Thomas, C.W.   +8 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

Chemostratigraphy and zircon typology in Cambrian sequence stratigraphy - North saharan platform (Algeria) [PDF]

, 2002
Aït-Salem Hamid. Chemostratigraphy and zircon typology in Cambrian sequence stratigraphy - North saharan platform (Algeria). In: Documents des Laboratoires de Géologie, Lyon, n°156, 2002. STRATI 2002. 3ème congrès français de stratigraphie.
Aït-Salem, Hamid
core  

Chemostratigraphy in southern Ontario by pXRF spectrometry

, 2017
For groundwater studies, the collection of sediment geochemistry is often beyond the scope, and budget of many programs, and is generally not included as part of routine data collection. Portable x-ray fluorescence spectrometer (pXRF) has proven to be a successful tool to characterize the chemostratigraphy of glacial derived materials collected from ...
R Knight, H A J Russell, F Bajc
openaire   +1 more source