Cave of the Mounds the Interior and the National Park Service. To be considered a NNL, "a site must be one of the best examples of a natural region's characteristic biotic or geologic features." Cave of the Mounds is home to many varieties of speleothems. As with most caves, stalactites and stalagmites are common. Formations found inside the cave include: These formations come in many different brilliant colors such as reds, browns, blues, and grays. The reds and browns are caused by the presence of iron oxide in the formation. Similarly, blues and grays are caused by manganese oxide. Some speleothems are even partially
Buckner Cave Buckner Cave Buckner Cave is located in the karst topography of the Crawford Upland in Monroe County, Indiana, United States just outside Bloomington. The cave contains approximately 3 miles of known passage. It is managed by the Richard Blenz Nature Conservancy (RBNC) and resides in privately owned property. Over the years, the cave has been heavily vandalized with spray paint and trashed out from garbage including; food wrappers, broken bottles, empty beer cans, and spent calcium carbonate from carbide lamps. There is an ongoing effort to restore the cave to its natural state. It is alleged that the earliest known