Limestone cliffs and cave systems hold clues to a prehistoric ocean.

Limestone rocks found high on the mountain contain remains of marine organisms that once lived in the ancient Tethys Sea.

The summit pyramid of Mount Everest, the highest point on Earth, is built from the remains of creatures that lived on an ancient seafloor roughly 470 million years ago. Limestone near the peak ...

Marine fossils discovered near the summit of Mount Everest reveal that the world’s highest mountain was once part of an ancient ocean floor before tectonic collisions lifted the Himalayas.

Scientists Discover Marine Rocks Showing Mount Everest Rose From the Ocean ...

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 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 ...