Results 71 to 80 of about 4,792 (217)

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

open access: yesSedimentology, Volume 73, Issue 5, Page 1631-1663, August 2026.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi   +4 more
wiley   +1 more source

Spatial Variations in Methane Content and Their Main Controlling Factors of the Deep‐Buried Coalbed in the Nalinhe–Hengshan Area, Ordos Basin

open access: yesEnergy Science &Engineering, Volume 14, Issue 7, Page 3422-3433, July 2026.
Ash yield is the primary geological factor controlling the spatial variations in the total gas content of the deep‐buried coalbed methane in the Nalinhe‐Hengshan area, Ordos Basin. However, porosity dominates the differential enrichment of the free gas content of the deep‐buried coalbed methane in the Nalinhe‐Hengshan area, Ordos Basin.
Shi Yunhe   +9 more
wiley   +1 more source

A new, ~4500‐year varve record and high‐resolution tephrochronology from lake Hämälänlampi, eastern Finland, provides age constraints for the Furnas C and the Glen Garry/Askja A‐2000 eruptions

open access: yesJournal of Quaternary Science, Volume 41, Issue 5, Page 837-854, July 2026.
ABSTRACT The northern European distal cryptotephra framework is constantly developing both in terms of identification of new tephra horizons and improved age constraints for the already well‐established tephra marker horizons. However, many prehistoric tephra layers have only been dated by the radiocarbon method, with its inherent problems.
Maarit Kalliokoski   +2 more
wiley   +1 more source

Microfacies Analysis and Source Rock Potential of Nammal Formation, Western Salt Range, Pakistan: Microfacies Analysis and Source Rock Potential of Nammal Formation, Western Salt Range, Pakistan

open access: yes, 2018
The present study investigates the microfacies and source rock potential of the Eocene Nammal Formation in the Nammal Gorge Section, western Salt Range, Pakistan. The Nammal Formation consists of light grey to creamy color limestones, olive green to grey
Rahim, Hamad-ur-   +4 more
core   +1 more source

Marine Isotope Stage 4 glaciation in northern England, UK: Evidence from Victoria Cave, North Yorkshire

open access: yesJournal of Quaternary Science, Volume 41, Issue 5, Page 770-783, July 2026.
ABSTRACT Victoria Cave, north Yorkshire, England, contains a long sequence of Pleistocene clastic sediments and calcite flowstones. Earlier work, using U–Th dating, established that the flowstone units formed in interglacial stages corresponding to Marine Isotope Stages (MIS) 13, 11, 9, 7 and 5.
Tom C. Lord   +7 more
wiley   +1 more source

Comparison Of Raw Material Determinations With Pxrf And Microfacies Methods

open access: yes, 2019
In this presentation the microfacies and pXRF analyses for the identification of silicite sources of archeological artefacts are compared. Microfacies analyses is a proved nondestructive geological method.
Hinz, Martin, Wehren, Helena
core  

Effect of Carbonate Microfacies on Contact Angle: Study from Middle Jurassic Tuwaiq Mountain Formation

open access: yes, 2017
Tuwaiq Mountain Limestone Formation (TMLF) is an important Middle Jurassic formation in Saudi Arabia as it encompasses two reservoir rocks, one source rock, and unconventional reservoir in Jafura basin.
Abdullah S. Sultan   +2 more
core   +1 more source

A remarkable radiolarian assemblage from the Csővár area (Hungary) improves biostratigraphical correlation of the Rhaetian

open access: yesPapers in Palaeontology, Volume 12, Issue 4, July/August 2026.
Abstract In the Csővár area of north‐central Hungary a remarkably well‐preserved Rhaetian radiolarian fauna, in which conodonts were also found, has enabled the identification of 49 radiolarian species belonging to 35 genera. The fauna is dominated by the orders Spumellaria and Entactinaria over less diverse Nassellaria.
Tim Cifer, Viktor Karádi
wiley   +1 more source

Microfacies caracteristiques du Trias lorrain

open access: yesBulletin de la Société Géologique de France, 1960
Abstract Describes the microfacies of the various detrital, limestone-dolomite, and salt zones in the Triassic of Lorraine, eastern France. These facies are stratigraphically significant in view of the absence of faunal key horizons.
J. de Mautort, Jean Ricour
openaire   +1 more source

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