MWH Global

Enviroscan Ukrainian Institute of Speleology and Karstology


Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/template/toolbar_left.php on line 5
Community news

Speleology in Kazakhstan

Shakalov on 04 Jul, 2018
Hello everyone!   I pleased to invite you to the official site of Central Asian Karstic-Speleological commission ("Kaspeko")   There, we regularly publish reports about our expeditions, articles and reports on speleotopics, lecture course for instructors, photos etc. ...

New publications on hypogene speleogenesis

Klimchouk on 26 Mar, 2012
Dear Colleagues, This is to draw your attention to several recent publications added to KarstBase, relevant to hypogenic karst/speleogenesis: Corrosion of limestone tablets in sulfidic ground-water: measurements and speleogenetic implications Galdenzi,

The deepest terrestrial animal

Klimchouk on 23 Feb, 2012
A recent publication of Spanish researchers describes the biology of Krubera Cave, including the deepest terrestrial animal ever found: Jordana, Rafael; Baquero, Enrique; Reboleira, Sofía and Sendra, Alberto. ...

Caves - landscapes without light

akop on 05 Feb, 2012
Exhibition dedicated to caves is taking place in the Vienna Natural History Museum   The exhibition at the Natural History Museum presents the surprising variety of caves and cave formations such as stalactites and various crystals. ...

Did you know?

That arete and pinnacle karst is a landscape of naked reticulated raw-topped ridges having almost vertical slopes and a relief of as much as 120 meters. the ridges rise above forest- covered corridors and depressions. found in new guinea at elevations of 2,000 meters and more [10]. both pinnacle karst and arete karst are varieties of limestone landscape formed under equatorial rain forest cover. they are characterized by vertical sided blades of bare rock fretted by dissolution [9].?

Checkout all 2699 terms in the KarstBase Glossary of Karst and Cave Terms


Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/template/toolbar_right.php on line 7
What is Karstbase?

Search KARSTBASE:

keyword
author

Browse Speleogenesis Issues:

KarstBase a bibliography database in karst and cave science.

Featured articles from Cave & Karst Science Journals
Chemistry and Karst, White, William B.
See all featured articles
Featured articles from other Geoscience Journals
Karst environment, Culver D.C.
Mushroom Speleothems: Stromatolites That Formed in the Absence of Phototrophs, Bontognali, Tomaso R.R.; D’Angeli Ilenia M.; Tisato, Nicola; Vasconcelos, Crisogono; Bernasconi, Stefano M.; Gonzales, Esteban R. G.; De Waele, Jo
Calculating flux to predict future cave radon concentrations, Rowberry, Matt; Marti, Xavi; Frontera, Carlos; Van De Wiel, Marco; Briestensky, Milos
Microbial mediation of complex subterranean mineral structures, Tirato, Nicola; Torriano, Stefano F.F;, Monteux, Sylvain; Sauro, Francesco; De Waele, Jo; Lavagna, Maria Luisa; D’Angeli, Ilenia Maria; Chailloux, Daniel; Renda, Michel; Eglinton, Timothy I.; Bontognali, Tomaso Renzo Rezio
Evidence of a plate-wide tectonic pressure pulse provided by extensometric monitoring in the Balkan Mountains (Bulgaria), Briestensky, Milos; Rowberry, Matt; Stemberk, Josef; Stefanov, Petar; Vozar, Jozef; Sebela, Stanka; Petro, Lubomir; Bella, Pavel; Gaal, Ludovit; Ormukov, Cholponbek;
See all featured articles from other geoscience journals


Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943


Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943

Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Quaternaire, Hors-série/Quaternaire, Hors-série, 2011, Issue 4, p. 7-14

Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
GHOST-ROCK STRUCTURES AND THE NATURE OF AZÉ CAVES

Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Abstract:

Because of the presence of wall and roof cupolas and other microforms indicative of differential weathering, we first of all considered the genesis of the Azé caves, following the usual concept of karstogenesis, as a phreatic formation. A second stage is a vadose evolution associated with the underground river. But the time relationship between the two caves presents a problem because
the deposits in the Aiglons gallery demonstrate a river evolution during the last glaciation. Today, we know that many karstic systems begin their genesis by a process of ghost-rock formation. The discovery of the “Galerie de Chauffailles” proves this origin, because the speleologists have removed not river sediments, but the residual alterite in a “pseudoendokarst”. Some stratigraphic sequences of
the bedrock in the prehistoric gallery can be seen as residual alterite: the “ghost-rock” in the “Galerie de Chauffailles”. The genesis of the Azé caves began by a ghost-rock phase giving a pseudoendokarstic system consisting of weathered interconnected cavities. This residual alterite is made up of less minus soluble minerals like silica cherts, clay minerals and sparitic calcite. It is very fragile and porous. The second stage consists in the mechanical removal of the residual alterite by an underground river. A very interesting characteristic of the Azé cave is that we can study the contact between the river sediments of the second stage and the residual alterit  of the first stage.

A cause de la présence de formes pariétales de type coupoles et microformes de corrosion différentielle, on a longtemps considéré la genèse de grottes telles celles d’Azé comme issue de conditions phréatiques, dans le contexte de la karstogenèse par évacuation totale. Une deuxième étape comprend une évolution vadose de type fluviatile. Mais les relations temporelles entre les deux grottes d’Azé posent un problème. Les dépôts fluviatiles de la Galerie des Aiglons démontrent qu’il a existé une circulation fluviatile durant la dernière glaciation. Cette constatation permet d’envisager une genèse de type fantôme de roche, pour laquelle cette question d’évolution ne constitue plus un problème. La découverte de la Galerie de Chauffailles prouve ce type de spéléogenèse. En effet, la désobstruction de cette galerie ne s’est pas faite dans les sédiments fluviatiles, mais pour une bonne part en retirant l’altérite résiduelle demeurée dans un pseudoendokarst. La genèse de la Grotte d’Azé commence ainsi par une altération in situ générant un système de pseudoendokarsts consistant en volumes altérés interconnectés. L’altérite résiduelle est composée des minéraux insolubles ou moins solubles comme les chailles, la calcite sparitique, les minéraux argileux. Ce milieu est fragile et très poreux. La
seconde étape évolutive est l’érosion mécanique partielle de cette altérite résiduelle par les rivières souterraines. Une caractéristique très intéressante de la grotte d’Azé est qu’il y est possible d’étudier le contact entre l’altérite résiduelle et les sédiments fluviatiles.

Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Keywords: azé caves, karstogenesis, ghost rock structures

Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943

Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943