@agave6_tomwalker, is this ID correct? I haven't seen this before.
On bark of Quercus sp.
DuPont State Forest, Lake Imaging Trail
Old, marble grave marker. Physcia adscendens, or something that looks like it, grows on/in the central portions of most of these rosettes and in between the rosettes as well.
on fallen coast live oak branch on ground
“Flaps” of powdery, granular soredia near the tips