Sediments at the southern termination of the Sangre de Dristo anticlinorium range in age from early Pennsylvanian through Dakota (Cretaceous). The study of the materials involved four objectives: 1. The deposits are classified and described as representing basin or platform environments of deposition. 2. The characteristics of the minerals including texture, degree of abrasional wear, heavy mineral suite, inclusions, optical and physical properties are summarized. 3. Tectonics are suggested by the type of deposits and sediments. 4. Recent studies reveal that rocks in the Sangre de Cristo Mountains have been an important source material for sediments since late Pennsylvanian time.