機器
abandoned
autumn
calcium
carbonate
chalk
chalk quarry
chalky
cretaceous
crusher
day
deposits
dig
digger
digging
escarpment
excavating
excavation
excavators
exploitation
exploiting
extracting
extraction
fossil
geology
gravel
ground
industrial
industry
landscape
mine
mineral
mining
open
open pit
opencast
pit
production
quarry
resource
rock
rocky
sand
stone
stonepit
terrace
tracks
white
work