Erected in the early fourteenth century B . C . as guardians of the Mortuary Temple, the two 50-foot monoliths consist of a quartzose sandstone rock ( quartzite ) formed by quartz particles cemented with iron oxide.
12.
The Mahnomen Formation has a lower member, which lacks iron oxide components, and an upper member dominated by beds of iron oxide argillite and lean iron-formation interlayered with non-iron oxide argillite, siltstone and quartzose sandstone.
13.
The geological formations are categorized under four heads namely, the ( 1 ) Archeans ( the gneisses ), ( 2 ) the Eparchean unconformity ( Quartzose sandstones Overlying the granite with a distinct unconformity ), ( 3 ) Puranas ( formation of Cuddapah group well developed in the valley ) and ( 4 ) Quaternary deposits.
