The Piedmont region consists of Paleozoic metamorphic and igneous rocks, and the landscape has relatively low relief. The Piedmont is the second largest region of Georgia, and it has 3 water systems: the Chattahoochee River, West Point Lake, and Lake Sidney Lanier. The rocks of the Piedmont are made up of Precambrian and Paleozoic metamorphic and igneous rocks and the soils are of a finer texture than those found on the coastal plain. Some specific types of rock in the Piedmont are schist, gneiss, and phyllite among others. Georgia's coastal plain is made up of sedimentary rock dating from the Late Cretaceous to Holocene periods. The primary natural mineral resource in the area is kaolin.