The DePauw Nature Park was the site of an active limestone quarry from 1917 to 1977. The limestone rock began forming 350 million years ago from the remains of animals living on the bottom of an ...

Limestone, made from calcium carbonate, takes millions of years to form. These sedimentary rocks are born from the decay and ...

In some locations there are land plants and reptile tracks. This layer of rock, known as the Redwall Limestone, forms a sheer cliff 500 ft high or more in most areas. The limestone gets its color ...

The aqua blue waters lap the rock formations, and in some cases, blast water through crevices in the Anastasia limestone, which gave the preserve its name. My son regularly climbs barefoot on the ...

CONNOR: Good thinking! I read a bit about limestone on the bus journey. Limestone is a sedimentary rock created by layers of skeletons and shells of sea creatures found in ancient, warm ...