gour
standage
tinaja
driphole
land spring
dump
weeping rock
basin
hygropetric
lum
cavern
rockhole
dyke
landslip
impoundment
wall spring
linn
magma chamber
detention basin
sump
landslide
rhine
water tower
cavern out
speleothem
cataclasis
ground water
moat
gnamma
spring water
well water
dibhole
dalles
connate
fork
megamine
fosse
rockfill
Mammoth Cave National Park
artesian well
aquifer
room of doom
passage
geoformation
arch
mesocavern
hush
mineshaft
rockfall
geomuseum
enhydros
pondage
scour
talus
upfilling
foss
grotto
overbreak
sinkhole
dripwater
diluviation
microfissure
trap
geohydrology
spelaeology
dam
Carlsbad Caverns National Park
seacave
speleology
rimstone
rift
chasmous
rine
diaclasis
epithermal
water spot
wellfield
shake
glory hole
basined
flowstone
falls
pool
speleo-
petrophysics
molehead
trench
caverned
cementation
cove
formation water
sunk fence
porphyrite
mammillary
boss