White Rocks full of plants and lichen connected to Ice Age

Knoxville News Sentinel
A cliff ecology study in Cumberland Gap National Historical Park has uncovered an assemblage of plants and lichens that echo back to the Ice Age.

Samples collected by Appalachian State University include a group of lichens normally found in the Artic and boreal regions of Canada, as well as a lichen species never before documented in southeastern North America.   Read full story