area
background
calcite
calcium
carbonate
cast
chalk
chalky
construction
cretaceous
deposit
dig
earth
ecology
environment
excavate
excavation
geological
geology
ground
hill
industrial
industry
land
landscape
lime
limepit
limestone
material
mine
mineral
mountain
natural
nature
open
opencast
pit
production
quarry
rock
rocky
site
sky
stone
stony
surface
texture
white