Birch trees grow and yellow lichen thrives on fractured bedrock exposed at wave sprayline along the Lake Superior shoreline, in Porcupine Mountains Wilderness State Park, Michigan, USA.
Birch trees grow and yellow lichen thrives on fractured bedrock exposed at wave sprayline along the Lake Superior shoreline, in Porcupine Mountains Wilderness State Park, Michigan, USA. The park was established in 1945 to protect the last large stand of uncut hardwood-hemlock forest remaining in the Midwest.