The 150-million-year-old Solnhofen Limestone in southern Germany contains prehistoric lagoon deposits known for yielding wonderfully preserved fossils, including those of pterosaurs: flying reptiles ...

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 ...

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 ...

Iron-rich rocks at McGraths Flat preserve Miocene rainforest life in remarkable detail, reshaping ideas about how and where exceptional fossils form. Beneath agricultural land in the central ...