Mount Ogden granite (Thesis and maps)

The area of gneissic granite on the west side of the Wasatch Mountains, immediately east of Ogden, Utah, was mapped on U. S. Geol. Survey 7-1/2 minute quadrangle topographic sheets. The gneissic granite has foliation of variable intensity and is finer grained than the migmatite to the south. There is a gradational contact between gneissic granite and migmatite. Within the gneissic granite there are numerous inclusions that have been grouped into three general types: Meta-diorite, Hornblende-labradorite gneiss, and Feldspar gneiss. Unconformably overlying the Precambrian rocks are the following Cambrian sediments: Tintic quartzite, Ophir shale, and Cambrian limestone and dolomite. Quaternary deposits occur as Lake Bonneville terraces and canyon gravels. Structures consist of the Ogden and Taylor thrusts, the normal Wasatch fault, and east-west trending folds. Within the map area the Ogden thrust is younger and cuts the Taylor thrust. Both of these structures have been transversely folded. The steep western edge of the Wasatch Mountains is determined by the Wasatch fault.