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 rockfall is the falling of bedrock from a cliff or steep slope [16].?

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

Search in KarstBase

Your search for vercors (Keyword) returned 23 results for the whole karstbase:
Showing 16 to 23 of 23
Etude du fonctionnement dune cavit englace durant un cycle climatique : site de la glacire dAutrans (Vercors), premiers rsultats, 2001,
Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Perroux, Annesophie
This underground ice work comes in the framework of high-resolution environmental records in underground deposits researches. With this aim, we have chosen the Autrans ice cave to analyse an ice core. In a preliminary research about the ice cave and its working in comparison to climatic variations, we have two informations: there's two types of working, of dynamic from season to season, and the cave morphology is very important for draughts.

Vercors, France, 2004,
Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Audra Ph.

An overview of the current research carried out in the French Western Alps karsts, 2004,
Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Audra, Philippe

Current research encloses karst systems geomorphologic approach, recent advances in study of karst structures which date back from the Upper Miocene. Karst genesis in Western Alps is brought up by systemic analysis, according to a geomorphologic approach. It uses the "karst immunity" that conserves old drainage structures and their associated sediments. Karst landscapes can be sorted into horizontal and vertical forms. Speleothems are clearly connected to the presence of vegetation but they also record geomorphic crisis. Clastic sediments reveal mechanical erosion. This approach concludes with karst genesis and speleogenesis reconstruction, which blend together evolution stages, environment characterization and processes. Researchers reconsider the preponderant part previously attributed to glaciers. Karst appears immediately when a gradient exists and when the aquifer is stripped of its impervious cover. Such conditions occurred from the Upper Miocene and sometimes before. Karsts of the Pleistocene age are only met in the Inner Alps where cover stripping occurred later. Vertical systems composed of shaft series are old and become more complex. Field evidence refutes Ford's classification, which assigns a deep phreatic origin. A brief account of the present state of knowledge, according to region and researcher's scientific themes, allows establishing the last decade's advances. It also shows a disparity between the North and the South Western Alps, where Vercors appears to be one of the best studied massifs in the Alps.


La scheresse 2003 et les mesures de temprature au Trou qui Souffle de Maudre : rle du flux gothermique, 2005,
Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Lismonde, Baudouin
The dryness of 2003 and the temperature measurements in the Trou qui Souffle (Maudre, France): role of the geothermal flux - A deep passage in the Trou qui Souffle (Vercors, France) was equipped with a Luirographe that allows to record continuously the variations in both water level and temperature. The results show that the dryness of 2003 induced an air temperature rise of 1C. In autumn and winter 2003-2004, several floods were recorded which were coupled with a decrease in temperature. These measurements allowed to evidence thermal heterogenities within the massif. We attribute these to the geothermal flux. A theoretical model (published in a previous article) provides an interpretation of the observed phenomena: the geothermal flux is focalised, thus the change of temperature in that deep level is very rapid.

Intrt des sdiments dtritiques endokarstiques en tant quarchive naturelle ? Discussion autour des dpts lacustres souterrains (Grottes de Choranche - Vercors), 2006,
Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Perroux Annesophie
Interest of endokarstic detritic sediments as a natural archive? Discussion on underground lacustrine deposits (Choranche Caves Vercors) - Among the various natural environmental archives, the underground detritic deposits remained hitherto forgotten, in particular for high resolution analyses and treatments. Through the study of the sedimentary accumulation of the Cathedral Lake (Choranche Caves, Vercors), this paper shows the potential of information which these deposits contain. Sedimentary cores were sampled in the lake, various data are measured (granulometry, spectrocolorimetry, magnetic susceptibility and gray level imagery), then submitted to statistical processing (PCA, Passega images...) and signal treatment (wavelet decomposition). The stratigraphy of charcoal fragments trapped in the sediment and dated by the 14C method, does not appear sufficiently coherent to propose a satisfying age-depth model. Only some dates make it possible to suppose that the sedimentary filling of the lake covers at least the 4000 last years, with an average rate of sedimentation estimated at 1.87mm/yr. The other results of this work make it possible to understand transport and deposition dynamics of the sedimentary particles in an endokarstic lake, in particular with regard to flooding episodes. The Cathedral lake has a binary functioning, with mainly a fine sedimentation (decantation), punctually stopped by flooding episodes, which on their turn have two different dynamics (brutal or progressive phenomena in sedimentation). Lastly, the study of various signals highlights a great number of sedimentation control factors; these factors seem to act mainly on small time scales (more than 80 % of the granulometric signal variation are linked to phenomena with a period inferior to 40 years, according to the chronological framework supposed in the first assumption). This work carried in Choranche shows that endokarstic detritic sediments contain high resolution archives of the environmental evolutions. Subject to a chronological positioning more precise than the one we have today, paleoenvironmental interpretations and reconstitutions will make it possible to go further in their reading.

The concepts of heritage and heritage resource applied to karsts: Protecting the Choranche caves (Vercors, France), 2006,
Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Gauchon C. Ployon E. Delannoy J. J. Hacquard S. Hoblé, A F. Jaillet S. Perrette Y.

In 2005, French Ministry of Ecology started procedure to inscribe 18 Caves of Chorance into the world Heritage list of UNESCO. The application has to answer to three objectives: the scientific interest, definition of the territory, and to propose the management model. For the first all the heritage sources has to be identified, such as flowstone formations, karst water objects and historical curiosities. This are very important and sensitive questions specially because they have been not answered before the procedure of the inscription started off.


Spatial distribution of soda straws growth rates of the Coufin Cave (Vercors, France), 2010,
Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Perrette Y. And Jaillet S.
The Choranche Cave system (Vercors, France) is an excellent locality for measuring the growth rates of large numbers soda straws. This is especially the case for the Coufin Cave, as enlargement of the cave entrance in 1875 led to a change in stalactite color from brown to white, thus providing a reliable chronomarker. The date of this brown-to-white calcite transition has been confirmed by lamina counting. We measured and georeferenced the growth-lengths of 306 soda straws in a 1m2 area of the roof of the Coufin Cave entrance chamber. Because of the very slow and sometimes inexistent water feeding of those stalactites, hydrochemistry analysis were not achieved and drop rate effect on growth were neglected; this study is based on a geomorphological and geostatistical work. By measuring a large number of soda straws in a very small area for which most of the parameters affecting stalactite growth could be considered uniform, and because flow rates are very slow (frequencies are always superior to 1 drop per half hour), we could ascribe differences in growth rates to variations in the global increase of water flow through the unsaturated matrix. Statistical and geostatistical analyses of the measurements showed that this set of similarly shaped stalactites actually consisted of three Gaussian populations with different mean growth rates: fast growth rate (FGR- mean of 0.92 mm.y-1), medium growth rate (MGR- mean of 0.47 mm.y-1) and low growth rate (LGR- 0.09 mm.y-1). Plotting the lengths and spatial distribution of the 20 longest FGR soda straws revealed that there is a rough pattern to the water flow through the cave roof. Even if no direction is statisticaly different from others, the observed directional pattern is consistent with local and regional tectonic observations. Plots of the spatial distribution of the soda straws show that FGR soda straws follow lines of regional geological stress, whereas MGR and LGR soda straws are more dispersed.

Spatial distribution of soda straws growth rates of the Coufin Cave (Vercors, France), 2010,
Deprecated: Function get_magic_quotes_gpc() is deprecated in /home/isthin5/public_html/addon-domains/speleogenesis.info/include/functions1.php on line 943
Perrette Y. , Jaillet S.

The Choranche Cave system (Vercors, France) is an excellent locality for measuring the growth rates of large numbers soda straws. This is especially the case for the Coufin Cave, as enlargement of the cave entrance in 1875 led to a change in stalactite color from brown to white, thus providing a reliable chronomarker. The date of this brown-to-white calcite transition has been confirmed by lamina counting. We measured and georeferenced the growth-lengths of 306 soda straws in a 1m2 area of the roof of the Coufin Cave entrance chamber. Because of the very slow and sometimes inexistent water feeding of those stalactites, hydrochemistry analysis were not achieved and drop rate effect on growth were neglected; this study is based on a geomorphological and geostatistical work. By measuring a large number of soda straws in a very small area for which most of the parameters affecting stalactite growth could be considered uniform, and because flow rates are very slow (frequencies are always superior to 1 drop per half hour), we could ascribe differences in growth rates to variations in the global increase of water flow through the unsaturated matrix. Statistical and geostatistical analyses of the measurements showed that this set of similarly shaped stalactites actually consisted of three Gaussian populations with different mean growth rates: fast growth rate (FGR- mean of 0.92 mm.y-1), medium growth rate (MGR- mean of 0.47 mm.y-1) and low growth rate (LGR- 0.09 mm.y-1). Plotting the lengths and spatial distribution of the 20 longest FGR soda straws revealed that there is a rough pattern to the water flow through the cave roof. Even if no direction is statisticaly different from others, the observed directional pattern is consistent with local and regional tectonic observations. Plots of the spatial distribution of the soda straws show that FGR soda straws follow lines of regional geological stress, whereas MGR and LGR soda straws are more dispersed.


Results 16 to 23 of 23
You probably didn't submit anything to search for