is located at a geodesic marker (Urza) on the Cerro da Bandeira, within the civil parish of Castro Verde. Slopes in this area are between 0-2% grade, although pronounced (15%) along the ravines of Cobres and Maria Delgada, and the vicinity of Ribeira de Oeiras (near the border with Almodôvar). In addition to these rivers, the municipality is crossed by other ribeiras (English: ravines or rivers): Ribeira de Alvacar, Ribeira da Fontinha, Ribeira de Terges, Ribeira da Chada, Ribeira da Sete and Ribeira da Gata. The soils within the municipality are considered poor, having a reduced capacity to support agriculture, and thus limiting its productive use historically. The subsoils are made-up of essentially granular schists, greywacke, sandstone, and in some areas quartzite, as well as rare volcanic metamorphic particulates with reduced permeability. Further, the municipality of Castro Verde is crossed by the Iberian Pyrite Belt, composed of a massive volcanogenic sulfide deposit (VMS) associated with the polymetallic flanks of volcanic cones in the form of pyrite, chalcopyrite, sphalerite, galena and cassiterite, that begins in Aljustrel, spreads through the lower Alentejo and extends into southern Spain. At a time when Portugal was separated by the sea from the rest of the Iberian Peninsula, a series of events connected to active and hydrothermal volcanism, lead to the formation of the volcano-sedimentary Pyrite complex (when the landmass of Portugal collided into the Iberian peninsula). Castro Verde lies on one of the most important extractive deposits in Europe, that is responsible for sustaining the economy of the region, albeit an area with elevated risk of erosion. Mining activity, as a consequence, dates back thousands of years, with the remains of Roman mining structures identifying the importance of this area to the expansion of Roman metallurgy. In addition to sulfide ore, this southern area of Lusitania, was an abundant source of other minerals, such as gold, silver, copper, tin, lead and iron. Ecoregions/protected areas A large part of the municipality is covered by the European Union's Natura 2000 project; it is denoted as a Special Protection Area (SPA) for endangered species of steppe birds such as the great bustard and lesser kestrel. Climate Castro Verde has a hot-summer mediterranean climate (Köppen: Csa) with some Atlantic influence. It has hot dry summers and mild wet winters. The average annual temperature falls normally between . During the warmer months, maximum temperatures can reach or exceed ; during