Carlsbad Cavern National Park lies within the limestone Guadalupe Mountain range – the world’s best-preserved Permian-age fossil reef – in what was once a shallow inland sea some 240-plus million years ago. I talked my …
June 7, 2011
Posted June 7, 2011
Carlsbad Cavern National Park lies within the limestone Guadalupe Mountain range – the world’s best-preserved Permian-age fossil reef – in what was once a shallow inland sea some 240-plus million years ago. I talked my …