To re-start blogging after my unwanted hiatus I would like to share a few informative sources on karst and karstification with you. As you may be aware karst is an often re-occuring problem in soluble rocks. Usually found in carbonates (esp. pure limestones) it can also be observed in sulfates or evaporites. Besides influencing limestone resource quality and playing a role the formation of Mississippi-Valley-type deposits (hence my interest) it also is a very important aspect in hydrology and groundwater flow and is recognised as a potential geohazard in the form of sinkholes. Last but not least it can influence petroleum reservoirs.
Karst and the USGS
Karst Information Portal
Karst Home Page
Karst - A potential Geohazard and Reservoir
Introduction to carbonates