Black very fine lichen on red sandstone

Black very fine lichen on red sandstone

Observation - Black very fine lichen on red sandstone - UK and Ireland. Description: I couldn't really see any structure. It was like a fine black covering. It was growing on the church itself which is medieval and constructed of red sandstone. None of the sandstone gravestones had this one on them.

I couldn't really see any structure. It was like a fine black covering. It was growing on the church itself which is medieval and constructed of red sandstone. None of the sandstone gravestones had this one on them.