Szakáll Sándor - Jánosi Melinda: Minerals of Hungary (Topographia Mineralogica Hungariae 4. Miskolc, 1996)

casite several sulfate minerals (copiapite, rozenite, jarosite, rhomboclase, voltaite) have been formed (Fig. 65). Fig. 63 PYROL

USITE (2.5 mm xl) Fig. 64 GOETHITE (1

0 cm sp) Eplény Ny ivód Pliocene basalts and basaltic tuffs are widespread, particularly in the Balaton Highlands and the Tapolca basin. The spectacular volcanic cones are typical of this area where opencast quarries have been supplying roadstones and building stones from the basalts and basaltic tuffs for decades. Augite, magnetite and forsterite are the commonest minerals in these basaltic rocks. In some of the quarries xenoliths are found which are thought to have been derived from the mantle. These have their own mineral assemblages depending on the original rock. Although forsterite is the predominant mineral in the