Ключевые слова: brown, carbonate, career, chalk, chalky, clay, digger, digging, dredging, earth, ecology, erosion, escarpment, excavation, excavator, excavators, exploitation, extraction, geological, geology, heavy, industrial, industry, limestone, lowland, machine, material, mine, mineral, mining, natural, nature, open, open pit, opencast, panorama, panoramic, pit, power, quarry, sand, soil, spectacular, surface, water, watercourse, work,