Dr. Nagy I. Zoltán szerk.: Fragmenta Mineralogica Et Palaentologica 3. 1972. (Budapest, 1972)

Textural features The texture of the investigated dike rocks is also variant. In the rock of the Sárhegy dike hornblende forms phenocrysts attaining 2-3 mm in length (Plate 1. Pig. 2.), but crystals of plagioclase, orthoclase and quartz forming the "groundmass" may also attain a length of 1-1,5 mm. Crystals of apatite, zircon, and sometimes, biotite and hornblende are idiomorphic, plagioclase Is hypidiomorphic

, quartz is mainly xenomorphic, orthoclase is partly hypidiomorphic and partly xenomorphic. The texture is of intermediate character between porphyritic and hypidiomorphic-granular. The texture of the Csala Forest dike is,similar to the former one, only hornblende phenocrysts are smaller, thus the hypidiomorphic-granular character is more pronounced.At the same time, it shows intermediate features to the texture of the third dike. There is no hornblende in the rock of the Székesfehérvár Quarry dike and biotite does not form phenocrysts here. Orthoclase, which is quite abundant here, may attain a length of 2 mm. It encloses laths of plagioclase and granules of biotite giving the texture poikilitic character (Plate 1. Pig. 1.). Apatite, magnetite, and zircon formed first in the dike rocks then biotite or hornblende developed, followed by plagioclase and orthoclase, finally quartz was formed. This order of crystallization differs from that of the Velence granite where orthoclase antedates plagioclase and biotite (Buda 1969).