Far below the surface of Mexico’s Yucatán Peninsula, a flooded labyrinth of limestone tunnels has quietly guarded one of the ...

An unusual type of fossilized fish can be found within the limestone of present-day Germany. The Late Jurassic era conditions ...

Mammoth Cave, the world's longest known cave system, stretches 426 miles under Kentucky. The cave's limestone began forming 330 million years ago when the region was submerged under an ocean. Visitors ...

Excavated from a hayfield near Warrensburg, Fossil Pond and its limestone evoke an age 300 million years ago when a vast sea covered much of the Midwest, including Kansas City. Gary Rhoades From a ...

The black "marble" tombstone is made of limestone that likely came from Belgium. International Journal of Historical Archaeology A mysterious black tombstone that marked the final resting place of a ...