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

THE NORTHERN BAKONY MOUNTAINS: A GEOLOGICAL AND GEOMORPHOLOGICAL DESCRIPTION

extends to the Castle Hill (a threshold surface) to the E. The terraced valley of the Gaja stream forms a superimposed-entecedent gorge here. Finally, the areas are listed where surface karstification is of remarkable rate: - NW part of the Sűrű Mountain Group, - the SW margin of the Dudar Basin, - the Tés Plateau, the Porva Basin and terrains to the S (between Som and Kőris Hills and between Bocskor and Kő Hills), - the N foreland of Kőris Hill (the Márvány-árok area), Kőris Hill, - Tés Plateau, Lókút Basin, - Pénzesgyőr basin (Kerteskő Gorge, the area above the Judit spring and Iharos-tető), - Hárskút Basin and the blocks to the W and S (Égett Hill, Mester-Hajag, parts of Középső-Hajag in the vicinity of Fehérkő-árok, at Augusztintanya, the Homód-árok area, Kis-Fekete-erdő). The extension of underground karst features is more difficult to determine. The streamsink-like or true streamsink caves formed during surface karstification, now inactive, are found in the areas enumerated. The same genetic type is represented by areas where karst processes were active at an earlier stage and thus they are left out from the list (eg. summit level of Nagy-Som Hill and Középső-Hajag). Some surface karst features are due to collapses of cavities and, therefore, should be mentioned under underground karstification. There are quite a few of such terrains in the mountains, for instance, N of the Porva Basin between the Hódos-ér and Bognár-árok (Dörgő Hill and Szent László-erdő) and in the Sűrű Mountain Group between the Ördög-árok and Kő-árok. The caves of the mountains associated with non-surface karstification are primarily grouped in valley sides (particularly along sections of superimposed-antecendent origin). Citing only a few of them, the most typical are the following: Gaja Gorge, part of the Ördög-árok, Kő-árok, Kőmosó Gorge, Cuha Valley, Hódos-ér, several sections of the Gerence Valley, upper section of Szilfakő Valley (Középső-Hajag) and Öregfolyás Gorge (Kőszoros Valley). In addition to the above, there are a number of regressional-superimposed valleys (Burok Valley, Hálóvető-árok, Öreg-Szarvad-árok, Csalános-árok, SzárazGerence Valley) in the sides of which caves or smaller hollows also occur.