Nature
Port Kennedy Bone Cave, a limestone cave in Pennsylvania's Valley Forge area, preserves one of North America's most important middle Pleistocene fossil deposits, dating to about 750,000 years ago. First uncovered by limestone miners in the 19th century, it attracted prominent paleontologists including Edward Drinker Cope, Henry C. Mercer, and Charles M. Wheatley. After being buried under asbestos-bearing industrial refuse and lost, the cave was rediscovered in 2005. Its fossils include Ice Age animals, living mammal ancestors, birds, reptiles, plants, and many extinct beetles, offering an unusually broad record of life during a cooler Pleistocene interval and helping document mammal evolution during the Irvingtonian age.
Hear stories like this as you drive
ExploreHere reads historical markers out loud as you pass them: over 325,000 stories across the US. No account needed.
4.7 · 800+ ratings · Free
FIND IT
Chesterbrook, Pennsylvania · United States