This is an overview of the geological subdivisions of the Romanian Carpathian Mountains. The Carpathians are a "subsystem" of the Alps-Himalaya System and are further divided into "provinces" and "subprovinces". The broadest divisions are shown in the map on the right. The last level of the division, i.e. the actual mountain ranges and basins, is usually called "units". The lowest-level detail for those units is maintained on separate pages.