aa
abyssal rock
alluvion
alluvium
ash
ashes
basalt
bedrock
block lava
brand
brash
breccia
calx
carbon
charcoal
cinder
clinker
coal
coke
conglomerate
coom
crag
deposition
deposits
diluvium
draff
dregs
dross
druid stone
ember
feces
festooned pahoehoe
froth
fume
gneiss
granite
grounds
igneous rock
lava
lees
limestone
living rock
loess
magma
mantlerock
metamorphic rock
monolith
moraine
offscum
scoriae
5
adiamante
allocution
ash-pan
clinkers
enuff
lapilli
metter
ouzo
pumice
pumicestone
recrement
semicolon
slag
spark plug
syenite
taro
tufa