Lecanora muralis

Thanks to Richard Droker, this is Lecanora muralis. Apothecia are very abundant at the centre. It was found on Beehive coke oven ruins in Redstone, CO.

 

Photographed using a Sony A7R using a Nikkor 85mm f/2.8 shift lens with a Fujinon closeup lens and a Sony flash. Beehive coke oven ruins

Done