Results 41 to 50 of about 8,956 (166)

Las microfacies carbonatadas neógenas en un sector occidental de la depresión del Bajo Guadalquivir

open access: yesEstudios Geologicos, 1991
Se establecen las microfacies carbonatadas (microfacies A a G), de los materiales calcareníticos neógenos de Carmona, Alcalá de Guadaira y Arcos de la Frontera-Bornos, situados en el extremo occidental de la Depresión del Guadalquivir.
F. L. Clauss
doaj   +1 more source

Emendation of the Grivska formation in its type area (Dinaridic Ophiolite Belt, SW Serbia) [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2018
Age, microfacies and depositional realm of the Grivska Formation is controversially discussed due to the fact that detailed investigations are missing. Based on reinvestigations of the type locality of the Grivska Formation and in adjacent areas,
Sudar Milan N., Gawlick Hans-Jürgen
doaj   +1 more source

Sedimentological, Diagenetic, and Sequence Stratigraphic Controls on the Shallow to Marginal Marine Carbonates of the Middle Jurassic Samana Suk Formation, North Pakistan

open access: yesJournal of Marine Science and Engineering, 2023
This study presents a thorough analysis of the sedimentology, diagenesis, and sequence stratigraphy of the Middle Jurassic Samana Suk Formation in the Hazara Basin of northern Pakistan.
Shazia Qamar   +5 more
doaj   +1 more source

Evidence of microbial activity from a shallow water whale fall (Voghera, northern Italy) [PDF]

open access: yes, 2012
The fossil bones, associated carbonate cements and enclosing concretion of a Miocene mysticete from inner shelf deposits (Monte Vallassa Formation, northern Italy) were analyzed for evidence of microbial activity. Optical and scanning electron microscopy,
Cavalazzi, B   +5 more
core   +4 more sources

Microfacies and Paleoenvironment Conditions of Kometan Formation in Dokan area, northeast of Iraq

open access: yesAcademic Science Journal
The well-bedded and white chalky to white grey limestone of the Kometan Formation is Late Turonian – Santonin in age. The rock samples were taken from Qalat area in the Sulaymaniyah governorate in northern Iraq and studied under many different ...
Ibraheem Mustafa
doaj   +1 more source

Catalogue of the Hantken collection: carbonate microfacies photographs from 1872-82 [PDF]

open access: yes, 1996
Maximilian Hantken (1821-1893), founding professor of the Department of Palaeontology at Budapest University, was a pioneer in stratigraphic micropalaeontological studies.
Kázmér, Miklós
core  

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

open access: yesMeteoritics &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   +6 more
wiley   +1 more source

Influence of sedimentary microfacies on the rock mechanics of ultra-deep reservoirs and its application: a case study of the Cretaceous formation in the BZ gas field of Kuqa Depression, Tarim Basin

open access: yesShiyou shiyan dizhi
To optimize the identification of sweet spots with natural fracture development in ultra-deep tight sandstone reservoirs of Cretaceous in the Kuqa Depression, Tarim Basin, this study systematically analyzed the differences in rock mechanical properties ...
Zhimin WANG   +6 more
doaj   +1 more source

MICROFACIES, DEPOSITIONAL ENVIRONMENT, AND DIAGENETIC PROCESSES OF THE MAUDDUD MEMBER, IN THE PERSIAN GULF [PDF]

open access: yesJournal of Petroleum Science and Technology, 2014
Mauddud member with the age of late Albian to Cenomanian is equivalent to the lower Sarvak formation in the southern Persian Gulf and adjacent area. In this work, microfacies, depositional environment, and diagenetic processes affected the Mauddud member
Alireza Shakeri, Somayeh Parham
doaj   +1 more source

Fifth-order cyclicity and organic matter contents relationship (Lower Eocene, Pyrenees) [PDF]

open access: yes, 2007
The Upper Limestone Member of the Corones Formation of the Spanish Pyrenees consists of various units (Lower and the Upper Foraminifera Units, Shale Unit, Cherty-ostracode Unit, Ostracode Unit and Chara-ostracode Unit) and offers strong facies and ...
Calvet, F.   +3 more
core   +4 more sources

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