ammonite
ammonoidea
ancient times
archaeology
bug
calculus
conch
concha
conchiolin
concrement
concrementum
concretio
concretion
creature
development drilling
disinterment
exhumation
fossil
history
insect
maelstrom
mining
mining operation
old times
preparation
primeval time
quixotic
rock
roman
romantic
sample
seafood
serendipity
shell
shell exoskeleton
shell fish
shellfish
snail
specimen
stone
vortex
whirlpool
wildeyed