Veress Márton: A Bakony természettudományi kutatásának eredményei 23. - Covered karst evolution... (Zirc, 2000)

KARSTIFICATION

Fig. 44. Topographic map of the basement and the surface around the pseudodepression (see Fig. 43) of karst object Mb-50 (Mester-Hajag) (VERESS-FUTÓ-HÁMOS 1986) Legend: 1. contour line; 2. contour line of limestone basement; 3. borehole site; 4. section (see Fig. 45) Postgenetic karstification If over paleokarst depressions of the floors of superimposed valleys (former ponors formed along a rock boundary) cover sediments thin out, mostly postgenetic karstification is induced. Thinning out can derive from sheet wash or from stream erosion (Fig. 18). As a result of subsequent clearing of passages, postgenetic karst depressions are produced (Picts. 19, 20, 21, 22). Postgenetic depressions develop in the area of paleokarst features. Postgenetic depressions are aligned along the floors of superimposed valleys. In the rows there occur pseudodolines, dolines-with-pseudoponor and depressions with postgenetic dolines-with-ponors. It is common that although the landforms are arranged in rows but do not follow the superimposed valleys along their whole length. Frequently, postgenetic features appear at the confluences of tributaries or in the bends of the enclosing valley.