ALKALICKO-ŽIVCOVÝ PALEORYOLIT Z LUDMÍROVA NA DRAHANSKÉ VRCHOVINĚ

The bimodal spilite-keratophyre association in the Konice-Mladeč Belt is poor in acid rocks. A small body of acid volcanites occurs at Ludmírov. Petrographically these rocks correspond to alkali feldspar rhyolite. The studied rocks contain phenocrysts of Kfeldspar, quartz and albite in a fine-grained groundmass composed mainly of quartz and K-feldspar; the proportion of albite in the groundmass is very small. Monazite-(Ce), rutile and zircon are accessory minerals