| http://www.w3.org/ns/prov#value | - The presence of these anomalous readings suggests that the rock layer, mostly limestone, between the aquifer and the surface waters, has been affected by karsting; a type of erosion affecting carbonated rock, caused by rainwater and other influences, that createsdissolution(i.e. sinkholes, caves, etc) of the material so that it becomes porous.
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