Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 82. (Budapest 1990)

Dulai, A.: The Lower Sinemurian (Jurassic) brachiopod fauna of the Lókút Hill (Bakony Mts., Hungary). Preliminary results

Fig. 8. The palaeoenvironmental model reconstructed on the basis of the palaeoecological examinations (a = A interval: the differentiated subsidence of carbonate platform: developing of plateaus and basins, resedimentation

, b = B and C intervals: the moving away of source area from the deposition place, c = D interval: appearance of a newly emerged plateau in the vicinity, again increased sediment transportation) Evaluation of palaeoecological resultsFor the sake of easier understanding I described the averages of the examined parameters in accordance with layer groups (Fig. 7). The specimen number, the taxon number, the saturation (the sedimentation rate) and the size dispersion have similar decline. In the A - B - C direction there is a continuous decrease, followed by a drastic or less drastic increase in the D interval. With respect to disintegration the situation is just reversed. It strongly increases in the A - B - C direction, then suddenly decreases in the D interval. To understand the above mentioned matters - using the model of VÖRÖS (1986) worked out for Pliensbachian as analogy - the following explanation can be given. (Fig. 8). The carbonate platform evolved at the end of the Triassic started to subside differentially in the Lower Jurassic. Certain blocks subsided faster, other blocks slower, so relatively emerged plateaus and subsided basins developed. From the plateaus a considerable amount of material