IODP SEDIS - Thesaurus -

Bartonian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Eocene
	.....Bartonian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Eocene
	.....upper Eocene
	......Bartonian
NT	Barton Beds
RT	Priabonian
SN	Europe. Above Auversian, below Ludian.