Zeolitized basaltic tuffs, more or less brecciated, with lapilli, located between lava flows, or at the contact with marls.
Primary tuff minerals (pyroxene, nepheline and olivine) are replaced by calcite, iron oxides and zeolites.
Ref.:
W. Szeliga, Mineralogical Society of Poland, Special Papers, 2003, V 23, 166-168.
Mineral List:20 entries listed. 15 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
