The geology of the Guadalupe Mountains is exceptional, so exceptional that the International Commission on Stratigraphy selected this section of rocks to serve as the standard against which all other rocks of Middle Permian age (270-260 million years ago) are compared. This distinction is a benefit to the National Park Service, supporting its mission, as well as a benefit to the international scientific community. It is also a bonus for backcountry visitors, providing an interesting hiking destination recognized for its geologic uniqueness.