At Rockport State Recreation Area, visitors can explore a fossil filled quarry and look for ancient remains that date back more than 400 million years.

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 ...

Thousands of years ago, an owl’s messy leftovers became prime real estate for some very determined bees. Deep inside a cave ...

v. 1. Productus limestone fossils. (text and atlas of plates) 1879-87.--v. 2. Fossils from the Ceratite formation. pt. 1. 1895.--v. 4. pt. 1-2, Geological results ...