? This lichen looked as though it had been pricked with a pin, the black holes were very tiny. Copy of Liverwort lichen
Another common place to find lichens is on headstones in old cemeteries. I found this one in Cades Cove in the Smokies. These lichens are growing on the sheep, which is made of marble. Some of the very old headstones were nearly illegible due to a heavy growth of lichens.