IODP SEDIS - Thesaurus -

Hartshorne Sandstone
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Pennsylvanian
	.....Middle Pennsylvanian
	......Desmoinesian
	.......Hartshorne Sandstone
RT	Oklahoma
	Arkansas
	Krebs Group
SN	In Krebs Group. E Oklahoma and W Arkansas. Added to Thesaurus in 1985.