Little Brown Dots - Lichen? Fungus?

Little Brown Dots - Lichen? Fungus?

Observation - Little Brown Dots - Lichen? Fungus?. Description: Not in a park or a garden but on a wooden post beside a road. Each dot is so tiny, I only discovered these were there when I enlarged a photo. Went back to take this. The area covered in the full sized picture is . . . a centimeter from top to botto

Not in a park or a garden but on a wooden post beside a road.

Each dot is so tiny, I only discovered these were there when I enlarged a photo. Went back to take this.

The area covered in the full sized picture is . . . a centimeter from top to bottom? Each dot is brown and domed and sitting in a white ring. I'm guessing this is the fruiting body of a lichen. ? ? ?

Also wondered about Common Grey Disco (Mollisia cinerea) - except it isn't grey, it's definitely brown.