Dr. Fűköh Levente szerk.: Malakológiai Tájékoztató 15. (Eger, 1986.)

FŰKÖH, L.: Kvartermalakológiai vizsgálatok a Mátra és Bükk déli előterében

(Kál mellett feltárt meszes üledékek), majd a tavi szukcesszió során egyre jobban feltöltődtek, s előbb - a szubboreálisban - még állandó vízborítású mocsarak (Füzesabony: Kisbudai-berek), majd időszakosan vízborította rétek alakultak ki (Füzesabony: Guba-kút), melyeknek szélén a patakot kisérő magaskórós patakparti növénytársulás volt a jellemző. Summary Summarizing the results of the investigations we can state, that at the southern foreland of the Mátra Mountains and Bükk Mountains (North-Hungary) in the case of the examined territory (between Nagyfüged and Füzesabony) (fig. 1.) streams reaching the Great Hungarian Plain played significant role in the formation of the environment from the begining of the second half of the Pleistocene age. According to the examinations of mollusc fauna collected from the former stream-beds, the erliest sediments (finegrained, blue sand) were deposited by Eger and Laskó streams at the vicinity of Füzesabony. The fauna of the above mentioned sediments can be class among the Trichia hispida — Bithynia leachi biozone and Helicopsis striata subzone (W1-2). Samples collected from the deeper part of the sediment (samples number 20-26) contain fauna referring to shrubbery environment ( the occurence of Vallonia costata). While the fauna of the upper part of the sediment refers to open, grassy environment (Helicopsis striata, Vertigo pygmaea, Chondrula tridens, Pupilla muscorum). The following sediments were deposited by the river Tárna, Tarnóca, and Bene. Under the above mentioned strata bedding of Pannonian (Upper-Pliocene) formations can be observed. Worth mentioning about the gravel beds, deposited by streams. According to the result of the malacological examinations that the faunae belong into the Trichia hispida - Bithynia leachi biozone, and Succinea oblonga subzone (W2, W2-3X Fauna marks open but less dry territory than in the case of the above mentioned land. Because of the deposition of Pleistocene sediments more and more abandoned meander formed and increased the territory of closed drainage lands. According to the examinations, the mollusc fauna belonges into the Lithoglyphus naticoides - Valvata piscinalis biozone (Holocene-Boreal). The latter refers to lacustrine environment (dominancy of Valvata piscinalis at Kál in calcareous sediments). Sediments at the vicinity of Füzesabony show changes in the palaeoenvironment (I. table: 3th sample). Lakes filled up gradually. Molluscs collected from this territory class among the Bithynia leachi - Gyraulus riparius biozone (Holocene, Subboreal). These were swamps during the subboreal stage, at this territory (Füzesabony, Kisbudai-berek: Bithynia tentaculata, Anisus spirorbis, Planorbis planorbis, Lymnaea peregra). It was followed by the formation of meadows covered by water periodically (Füzesabony, Guba-kút; characteristic species are as follows: riverside association - Cepaea vindobonensis, Helix pomatia, Bradybaena fruticum: wet meadow - Succinea oblonga, Succinea elegáns, Chondrula tridens, Vallonia pulchella).