Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 90. (Budapest 1998)

Dulai, A.: Early Jurassic brachiopods from the basal layers of the Pisznice Limestone of Lábatlan (Gerecse Mts, Hungary)

Sparitic infilling of brachiopods The brachiopod shells are infilled partly by micritic lime mud and partly by coarsegrained sparry calcite. The examination of their ratio may be indicative of the sedimentation rate. The percentage of sparitic infilling is 56.3% in layer 1 and 25% in layer 2 of the Tölgyhát quarry (Fig. 10). So the proportion of sparry calcite dropped to less than half in the higher part of the examined section. Tölgyhát quarry Póckö 40 % 60 % °/ /o 11 Figs 9-11. 9 = ratio of disarticulated valves, 10 = sparitic infilling of brachiopod shells, 11 = mean size of brachiopods