Indiana’s limestone deposits were formed aeons ago when the land was the floor of an ancient sea, peopled with small, shell-bearing animalcules. Dying, these formed massive beds of oolite.

A chunk mined by Indiana Limestone Company, founded in 1926, one of the foremost purveyors of this special stone. National Museum of Natural History The Hoosier State’s first commercial ...

The spherical carbonate grains are referred to as oolites. Three-quarters of the way up the rock walls, you can see a thick whitish-yellow layer; this is the layer of oolitic limestone. You can also ...

Three limestone snapping turtles have joined the Indiana Dunes Indigenous Cultural Trail at the Indiana Dunes Visitor Center ...