Results 61 to 70 of about 2,331 (192)

Geology of the Mt. Cosce sector (Narni Ridge, Central Apennines, Italy) [PDF]

open access: yes, 2016
This paper is companion to a 1:15,000 scale geological map of the southern sector of the Narni Range in Central Italy. This sector of the Apenninic Chain was affected by the western Tethyan rifting stage during the Early Jurassic, and the inherited ...
Cipriani, Angelo
core   +1 more source

Hierarchical constraint geological modelling method for carbonate paleokarst caves: A case study of Ordovician fracture-cavern unit in Tahe Oilfield

open access: yes地质科技通报, 2022
The characteristics of carbonate paleokarst cave and filling have always been the difficulty of characterization and modelling. Based on the seismic, geological and logging data, this paper puts forward the idea of three-level progressive modelling of ...
Wenbiao Zhang   +5 more
doaj   +1 more source

The record of the Paleocene-Eocene thermal maximum in the Ager Basin (Central Pyrenees, Spain) [PDF]

open access: yes, 2013
The sedimentary record straddling the Paleocene/Eocene boundary in the Ager Basin (southern Central Pyrenees) was investigated by combining facies analysis, sequence stratigraphy and stable isotope data, within an interval characterized by a great ...
Manzi, V., Minelli, N., Roveri, M.
core   +3 more sources

Ancient karst at the eastern slope of the Middle Urals and the Early-Middle Carboniferous boundary

open access: yesЛитосфера, 2016
The paleokarst occurrences associated with Lower Carboniferous limestones in the east of the Middle Urals are considered. We analyse the nature of the Early-Middle Carboniferous boundary.
G. A. Mizens   +3 more
doaj   +2 more sources

The Effect of Mining Activities on the Paleokarstic Features, Recent Karstic Features, and Karst Water of the Bakony Region (Hungary)

open access: yesMining, 2022
This study describes the direct and indirect effects of mining on the karst of the Bakony Region. For this, the results of geological and mining research of the last century, the results of hydrological research of fifty years, as well as the ...
Márton Veress
doaj   +1 more source

La sedimentación liásica en el sector central del Subbético medio: registro de la evolución de un rift intracontinental [PDF]

open access: yes, 1987
Durante el Lias medio tuvo lugar el paso brusco de la sedimenta-ción carbonatada somera a la pelágica en la Zona Subbética, en relación con la evolución de un rift intracontinental.
García Hernández, Manuel   +2 more
core   +1 more source

Restoration of paleokarst landform and its geological significance: A case from Middle Permian Maokou Formation in Northwestern Sichuan Basin

open access: yesPetroleum Exploration and Development, 2016
Based on the analysis of deposition and tectonism, “residual thickness method” is used to restore the paleokarst landform of Middle Permian Maokou Formation in northwestern Sichuan Basin.
Dahai TANG   +7 more
doaj   +1 more source

Geology and Hydrology of Karst in West-Central and North-Central Florida [PDF]

open access: yes, 2008
The state of Florida is blessed with the highest density of large springs in North America and hundreds of smaller springs where the water from limestone aquifers returns to the surface (Scott et al., 2004).
Florea, Lee J
core   +1 more source

Geoquímica de las rocas asociadas al paleokarst cretácico en la plataforma de Actopan: evolución paleohidrológica

open access: yesRevista Mexicana de Ciencias Geológicas, 2018
El paleokarst expuesto en las rocas cretácicas de la Plataforma de Actopan (Estado de Hidalgo) permite investigar, mediante la petrología y la geoquímica, la posición de las zonas vadosa y freática que propiciaron la formación del antiguo karst durante ...
Baldomero E. Carrasco-Velázquez   +3 more
doaj  

Paleokarst shafts in the western desert of Egypt: A unique landscape

open access: yesActa Carsologica, 2013
Paleokarst shafts in the western desert of Egypt: A unique landscapeThe Eocene limestone plateau of the Western Desert of Egypt has various karst features, including shafts created during ancient wet periods.
Ashraf Mostafa
doaj   +1 more source

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