Conglomerate Rock
Sangre de Cristos, Colorado | 2024
Much of the Sangre de Cristo Range is composed of this unique conglomerate rock, which contains rounded, river eroded stones seemingly cemented together. These old rounded stones originated as eroded debris from the long gone Ancestral Rockies, deposited in alluvial fans and deltas where the matrix of mud and stones hardened into solid rock over millions of years. This rock was later thrust upwards around 15-5 million years ago, forming the mountain range we see today. Photo © copyright by Jack Brauer.