Geologic History. Expansion in this right the main Rio Grande rift started about 36 million years back.

Geologic History. Expansion in this right the main Rio Grande rift started about 36 million years back.

Expansion in this the main Rio Grande rift began about 36 million years back. Rock debris that eroded through the developing rift-flank highlands, in addition to wind-blown and playa pond deposits, accumulated into the subsiding Mesilla Basin. These fill that is basin, referred to as Santa Fe Group, are 1500 to 2000 foot dense beneath Kilbourne Hole (Hawley, 1984; Hawley and Lozinsky, 1993). The uppermost sand, silt, and clay regarding the Pliocene to very very early Pleistocene Camp Rice development, the youngest device associated with Santa Fe Group in this an element escort girl Dayton of the basin, are exposed within the base of Kilbourne Hole. Continue reading Geologic History. Expansion in this right the main Rio Grande rift started about 36 million years back.