Results 61 to 70 of about 2,318 (188)

Fábricas diagenéticas asociadas al paleokarst del techo de la Unidad Intermedia del Mioceno de la cuenca de Madrid

open access: yesEstudios Geologicos, 1997
Los materiales carbonáticos y evaporíticos del techo de la Unidad Intermedia del Mioceno de la Cuenca de Madrid han actuado como soporte de fenómenos de karstificación temprana, cuyo desarrollo ha supuesto un cambio significativo en la evolución del ...
J. C. Cañaveras   +3 more
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

Karst: a very diverse concept [PDF]

open access: yes, 2016
La gran diversidad intrínseca del karst y la variedad de campos científicos desde los que ha sido estudiado este medio ha generado un espectacular aumento de su conocimiento.
Andreu Rodes, José Miguel   +10 more
core   +2 more sources

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

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

Los elementos traza (Mg, Sr, Ha, Fe, Mn) en carbonatos: ambiente genético del Karst del techo de la unidad intermedia de la Cuenca neógena de Madrid. [PDF]

open access: yes, 1992
Este trabajo trata de caracterizar geoquímicamente el karst del techo de la U. Intermedia del Mioceno en las partes centrales de la Cuenca de Madrid. Para ello se han estudiado una serie de elementos traza (Mg, Sr, Na, Fe y Mn) mediante fluorescencia de ...
Calvo Sorando, José Pedro   +3 more
core  

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

New biostratigraphic data from the Callovian-Oxfordian La Manga Formation, Neuquén Basin, Argentina: Evidence from an ammonite condensed level [PDF]

open access: yes, 2012
The La Manga Formation constitutes most of the sedimentary record of the Callovian-Oxfordian in the Neuquén Basin. This stratigraphic unit represents the middle part of the Lotena Mesosequence, which is dominated by carbonates with interbedded shales ...
Bressan, Graciela Susana   +4 more
core  

Palaeoenvironmental and diagenetic reconstruction of a closed-lacustrine carbonate system - the challenging marginal setting of the Miocene Ries Crater Lake (Germany) [PDF]

open access: yes, 2017
Chemostratigraphic studies on lacustrine sedimentary sequences provide essential insights on past cyclic climatic events, on their repetition and prediction through time.
Abdul Aziz   +95 more
core   +1 more source

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