Acta Carsologica 44/3, the issue dedicated to the 60th Anniversary of the journal, is now online.
The International Society for Subterranean Biology will fund five travel fellowships at 500 Euros each to support students and young scientists from outside the U.S. in order to attend and present their research results at the 2016 International Conference on Subterranean Biology (ICSB) in Fayetteville, Arkansas, USA.
Book about karst & caves of Croatia
The 23rd International Conference on Subterranean Biology will be held from June 13 to 17, 2016 in Fayetteville, Arkansas, on the campus of the University of Arkansas.
A session on Evaporite karst is being organized within the EGU General Assembly to be held as usual in Vienna, 17-22 April 2016
Did you know?
That abney level is type of clinometer with a bubble tube used in cave survey to determine vertical angles .?
Checkout all 2699 terms in the KarstBase Glossary of Karst and Cave Terms
Featured article from geoscience journal
A large number of uniform cone-shaped dissolution pipes has been observed and studied in Quaternary coastal calcareous arenites in Apulia and Sardinia (Italy) and Tunisia. These cylindrical tubes have a mean diameter of 52·8 cm and are up to 970 cm deep (mean depth for sediment-free pipes is 1·38 m). They generally have smooth walls along their length, are perfectly vertical and taper out towards their bottoms. Their development is not influenced by bedding nor fractures. Sometimes their walls are coated by a calcrete crust. Their morphology has been studied in detail and their relationships with the surrounding rocks and with the environment have been analysed. The perfectly vertical development is a clear evidence of their genesis controlled by gravity. The depth of the dissolution pipes can be described by an exponential distribution law (the Milanovic distribution), strongly suggesting they developed by a diffusion mechanism from the surface vertically downward. We believe dissolution pipes preferentially form in a covered karst setting. Local patches of soil and vegetation cause infiltration water to be enriched in carbon dioxide enhancing dissolution of carbonate cement and local small-scale subsidence. This process causes the formation of a depression cone that guides infiltrating waters towards these spots giving rise to the downward growth of gravity-controlled dissolution pipes. A change of climate from wetter phases to drier and hotter ones causes the formation of a calcrete lining, fossilizing the pipes. When the pipes become exposed to surface agents by erosion of the sediment cover or are laterally breached the loose quartz sand filling them may be transported elsewhere.