Growing the Geologic Column

Everybody who thinks the Vishnu is part of the geologic column in the Grand Canyon raise your hand. It is composed of schist, gneiss and granite so it's part of the geologic/strat column.Go here and download this and copy it to your desktop so you can blow it up. It is the stratigraphic column in North Dakota and shows the rocks going from the present all the way back to the Precambrian.https://www.dmr.nd.gov/...tion_List/pdf/MiscSeries/MS-66.pdf