石化した
ancient
archaeological
artifact
biology
bone
complete
display
eocene
era
evolution
excavations
exhibit
fauna
fish
formation
fossil
geologic
green
history
layer
matrix
middle
museum
natural
organism
original
paleontology
past
prehistoric
preparation
presentation
primeval
priscacara
quarry
river
rock
science
sediment
sedimentary
skeleton
taphonomy
usa
wildlife
wyoming
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