aqua
aquifer
artesian
auger
bedrock
boer
bore
borehole
borer
clay
construction
deep
design
digging
drill
drilling
earth
education
engineering
environment
extraction
flat
geologic
geological
geology
geotechnical
gravel
ground
groundwater
hole
illustration
industrial
industry
layer
mining
petroleum
pit
process
resource
resources
rig
rock
soil
technology
tool
under construction
underground
water
work