activity

bucket

bulldozer

business

calcareous

carboniferous

crusher

dark

deposit

destruction

development

dirt

equipment

excavate

excavation

excavator

extraction

geology

heavy

huge

industrial

industry

inside

large

limestone

loader

machinery

manufacturing

material

mine

mineral

mining

move

narrow

natural

outdoor

pit

powerful

quarry

resource

rich

rock

rough

sedimentary

soil

technology

transportation

tunnel