Geology and Minerals
The geology of Croatia is predominately composed of rock formations from the Precambrian period. Much of this land is covered by younger sedimentary rocks and deformed or superimposed by tectonic activity. The country is split into two main onshore provinces: a smaller part of the Pannonian Basin and the larger Dinaric Alps. The carbonate platform karst landscape helped create the weathering conditions that form bauxite, gypsum, clay, spilite, and limestone.
1991 Mount Unzen eruption.
Fluorescence.
Text from Wikipedia; plate via Wikimedia Commons. Text CC BY-SA 4.0; plate freely licensed (see Commons). Source record. Images and catalogue data are reproduced from open-access collections.