The collection of "very rare" cave pearls includes examples that were found to contain archaeological artifacts—a world first ...

often a fragment of rock or piece of mud. A study recently published in Archaeometry, reports that 50 cave pearls have been ...

This popular 11-mile out and back trail passes under Arch Rock, a narrow natural tunnel formed over time due to wind and water erosion, and leads to the Alum Cave Bluffs and overlooks, such as ...

"Our initial research focused on mapping and surveying for archaeological artifacts within the spring tunnel. Cave pearls, a rare type of speleothem, were not the primary objective of our ...