id	keyword
gc-184	zone
gc-184	fig
gc-184	planktonic
gc-184	interval
gc-184	foraminiferal
gc-184	bolli
gc-184	eocene
gc-184	jihar–5
gc-184	oligocene
gc-184	pearson
gc-184	globigerina
gc-184	berggren
gc-184	turborotalia
gc-184	et al
gc-184	species