Quirigua--observations made in June 1979 
Zoomorph B--White weathering in grooves (foto) 
Zoomorpn G-- 
N side left; Trentopohlia gone 
Oscillatoria in surcos 
r? ¢ ‘ 4 fs 
ZOOMOYTDON UV 
Front: some alga recolonizing 
roy ”~ 
Stela. A 
Lower quadrats: 
S side: white crust persists rl 
N,E,W, clean except lower right N yellowish 
Mid quadrats 
All lichens gone N & S sides 
Upper quadrats: 
Phyllopsora on left crumblesf USt 4A Aw 
Orange crusts weakened 
alae ( 
(2 
ct 
oD 
fend 
a 
2, 
fo VW 
5s 
NN, S sides: clean except for few crumbling remnants 
U 
W: clean except some alga at top 
‘ me SE NE wo. Mad hy, fan A 
W side: black rain streak down middle; orange spots 
(6-7) dull, dead 
