ammonite
ancient living thing
ancient times
ann moen
chambered nautilus
devonian period
discoverer
discovery
excavation
extinct organisms
extinction
fossil
husks
living thing
marine organism
mesozoic cretaceous
mining
mollusk
museum
ordovician period
paleontologist
paleontology
paleozoic silurian period
rock
sea
shell
shellfish
stone
stratum
univalve shell
washington convention