Agria 33. (Az Egri Múzeum Évkönyve - Annales Musei Agriensis, 1997)

Fűköh Levente: A malakológiai vizsgálatok szerepe a régészetben

the rivers running down from the above mentioned mountains (Bene-, Tarnóca-, Tarna-, Laskó- and Eger-stream). On the basis of the examinations of the sediments of the former riverbeds we can state the following: I. The ancient - Tarna and its drainage system (Bene-stream and Laskó-stream). Terrace sediments formed during the Late - Quaternary. According to the malacological material of the older sediments (the occurrence of Vallonia tenuilabris, Vertigo geyeri, Vertigo parcedentata) terrace formation took place during the second half of the Late-Pleistocene. The climate was cool and rainy (Trichia hispida - Bithynia leachi zone, Succinea oblonga subzone, Würm2). Holocene layers (Lithoglyphus naticoides-Valvata piscinalis zone, Holocene, boreal)covering the Pleistocene sediments sign watercourse, dead water territories and dry grassy associations where the occurrence of species refer to aforestation. II. The environ of Laskó-stream and Eger-stream. The analysis of qartermalacological material proved Late-Pleistocene and Holocene sediments. The older sediments belong to Helicopsis striata subzone of Trichia hispida - Bithynia leachi zone (Pleistocene, Wurm 1-2). The younger sediments can be ranged into Bithynia leachi - Gyraulus riparius zone (Holocene, Sub-boreal). 123