The geology of Croatia has some Precambrian rocks mostly 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 Dinarides. These areas are very different. The carbonate platform karst landscape of Croatia helped to create the weathering conditions to form bauxite, gypsum, clay, amphibolite, granite, spilite, gabbro, diabase and limestone.