石化した
age
ammonite
ancient
animal
antique
archeology
artifact
biology
bowl
cephalopod
circle
civilization
cliff
cockleshell
coil
epoch
era
evolution
fossil
fossilized
geological
geology
history
human
isolated
marine
mineral
mollusk
nacre
nacreous
natural
nature
ocean
old
organism
paleontology
patience
period
prehistoric
prehistory
primitive
rock
scientific
sea
seashell
shell
snail
spiral
stone
white