Final answer:
Carlsbad Caverns National Park and White Sands National Monument are located in New Mexico. The park's extensive caves, such as Lechuguilla Cave, were formed by acidic brines that dissolved the carbonate reef.
Step-by-step explanation:
Carlsbad Caverns National Park and White Sands National Monument are both located in the state of New Mexico, which is often referred to as the “land of enchantment.” The geological history of Carlsbad Caverns National Park features extensive caves and karst formations, including Lechuguilla Cave, which is the 8th longest explored cave in the world. These caves were formed by acidic brines that dissolved the carbonate reef from the ancient Delaware Sea, which left behind evaporite deposits known as the Castille and Salado Formations and also impacted the preservation of fossils in this region's Permian reef system.