quarry for extracting crushed stone in the city of itaara, rs, brazil

workforce vegetation transportation trade tourism sustainability supply sul stone slabs sedimentary safety rural rugged rock rio revitalization regulation quarrying quarry processing preservation noise natural mining machinery local landscape itaara investment infrastructure industry industrial history heritage gravel granite grande geology formation extraction extracting excavation erosion environment ecosystem economy dust development cutting crushed construction cliffs city brazil boulders blocks basalt artisanal abandoned