IODP SEDIS - Thesaurus -

Grimsby Sandstone
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Silurian
	....Lower Silurian
	.....Grimsby Sandstone
RT	Ontario
	Pennsylvania
	New York
	Medina Formation
SN	In Medina Formation. Added to Thesaurus in 1989.