Indiana Univ. Bloomington:geo Notes: Salem Limestone: Carving and Sculpture [Pdf]

Describes the formation of the Salem Limestone during the Mississippian Period.

Explains what standing rocks are, how they are formed by erosion, and gives the names of some well-known ones in Indiana.

Presents some facts about brachiopods, a fossil that is common in Indiana rocks.

Describes the geological features of the karst topography found in Indiana.

A brief history of coal mining in Indiana.

Discusses the mass extinction event that wiped out many prehistoric animals 65 million years ago and why there are no dinosaur fossils to be found in Indiana.

Explains what moraines are, how they are formed, some types, and where they are found in Indiana.

Describes how glaciation created the sand and gravel deposits in Indiana and what these resources are used for.

Presents some facts about conodonts, extinct eel-like animals whose fossils have been found in Indiana's marine sedimentary rocks. Their important role in geologic research is also discussed.

Presents some facts about crinoids, a marine animal abundant during the Paleozoic Era, with many fossil species present in Indiana. This animal can still be found in the Caribbean Sea today.