A Mountain of Water
The Majella massif is a massive, porous block of Mesozoic-era carbonate rock, a geological structure known as a carbonate platform. This structure, part of the Apennine Mountains, is composed of fractured limestone and dolomite from the Cretaceous to the Miocene epochs, formed in a warm, shallow sea similar to the modern-day Bahamas. This entire mountain functions as a colossal sponge. Rain and snowmelt from its highest peaks—many over 2,500 meters—percolate down into a vast network of cracks, conduits, and caves dissolved into the rock over millions of years.
This creates a huge karst hydrogeological system. Instead of flowing over the surface, water travels underground through this complex limestone plumbing. The massif's total groundwater discharge from its main springs averages around 7,500 liters per second, making it a water resource. The largest and most famous of these outlets are the springs that form the headwaters of the Verde and Orta rivers. The Verde River springs, near the town of Fara San Martino, are particularly well-known for their high volume and the exceptional purity of their water.