Carnia is a territory belonging to the historical and geographical region of Friuli, whose municipalities, within the region of Friuli-Venezia Giulia administratively belong all to the province of Udine. In Roman times it was known as part of the Carnorum Royal and gave the name to all today's Friuli. Located in the carnic Alps and includes the upper basin of the Tagliamento River; is bordered to the North by Austria, to the South with the province of Pordenone, Veneto to the West and East by the Canal del Ferro-Valcanale, also in the province of Udine. Consists of geologically differentiated groups, the mountains consist of three types of rock: limestone, dolostone and Flint. Carnia is crossed by the carnic Alps which extend from Passo di Monte Croce carnico to sella di Camporosso, where they begin the Julian Alps, which rise (in the Italian side) between the river Fella and the upper soča region.