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Thesaurus

Middle Devonian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Middle Devonian
NT	Eifelian
	Givetian
	Balaklala Rhyolite
	Boyle Dolomite
	Cedar Valley Formation
	Columbus Limestone
	Copley Greenstone
	Couvinian
	Delaware Limestone
	Detroit River Group
	Dundee Limestone
	Elk Point Group
	Hamilton Group
	Jeffersonville Limestone
	Ludlowville Formation
	Mahantango Formation
	Marcellus Shale
	Michelle Formation
	Moscow Formation
	Nahanni Formation
	Onondaga Limestone
	Prairie Evaporite
	Saint Laurent Limestone
	Sylvania Formation
	Tioga Bentonite
	Tully Limestone
	Winnipegosis Formation
RT	Lower Devonian
	Upper Devonian
	Beaverhill Lake Group
	Martin Formation
	Swan Hills Formation
	Lucas Formation
	Fisset Brook Formation
	Ross Formation
	Zlichovian