Tertiary Terranes of New Mexico

Deposits of Tertiary age are extensively developed in New Mexico. The greatest thicknesses are found in the northwestern and central parts of the state, where their maximum measurements reach no less than 3,000 feet. Many minor areas are also known. These deposits recline usually in marked unconformity upon the beveled edges of the Cretaceous and older strata. They are geologically among the most important deposits of the region