Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Young maar structure in Podbořany area
Abstract
There are three well-known young volcanic bodies in northwest Bohemia; these are cinder cones of Komorní hůrka, Železná hůrka and Příšovská homolka. The Pleistocene maar structure in Nepomyšl surrounding published by Kopecký (1985, 1987-88) is the endorheic depression on the top of lava flow generated by subterranean erosion of volcaniclastic material under the lava and sub-aquatic destruction of lava in fact. Three kilometers northwest from this locality has been real double maar found. This structure has two preserved craters with sharp rims and crater lakes. Xenoliths of burned Permo-Carboniferous sediments (claystones and conglomerates), granitoid of unknown affiliation and white sandstones were found around. Silicified woods are common too. Shape of craters and freshness of juvenile glass in basaltic scorie fragments could sign the Pleistocene age of this volcanic structure.
