bank
blue
bucket
calx
canyon
chalk
chalkquarry
clear
construct
day
deposit
dig
dirt
dragline
earth
earthmover
environmental
equipment
excavator
expand
extract
extraction
gravel
ground
hill
hoist
industrial
industry
landscape
large
limestone
machinery
mine
mining
mountain
natural
old
operate
pile
pit
quarry
rock
sky
stone
summer
walking
work