side: white crust fainter, little phyllopsora left 
Dirinaria 90% gone; face yellowish + hat top 
white crust much attenuated 
es gp | : Pe / : 
side: white crust attenuat ed (foto); Phyllopsora nearly gone 
Bact : a 
VY Od 
j 
side; do,. yellow eee, =a Roe 
a = \e { Kf ff ff fer f Inf 
side: endolithic lichen ae = tee Dirinaria left 
side: More or less clean now .. 
Top: darkening as alga returns 
Stela I 
Lower: little white discoloration left 
Mid: clean except 10% alga on W side 
S 
Jpper;: clean except some alga recoloniz 
= 
it 
S % 
% 
