The Aveiro District, located right south of Porto, around the harbour city Aveiro, is a typical wine growing area. Most of the district is a coastal plain along the Atlantic Ocean, the Portuguese Occidental Meso-Cenozoic sedimentary basin. It is covered by Quaternary sediment, mostly consolidated sands and clays. Due to the geology there are no caves, but numerous quarries and in the adjacent hill country there are granites and some abandoned mines. The main resources are lead, molybdenum, silver, and zinc. The slate in Canelas is mined for roofing, flooring, and façade coverings, but is famous for its fossil content.