Monument 13 
Traces of green alga in gooves, Lichfns in NE quadrant persistent, 
Stela C 
Phyllopsora now 50% gone 
Little alga left; orange lichen persists, ”}/™ 
Phyllopsora all gone; alga 90% gone 
Phyllopsora all gone; moss at top 60% gone; orange spots 
turning yellowish 
Stela D 
N side: Phyllopsora about 50% gone now; crusts in lower half visible. 
7% side; latexed 
S side: Phyllopsora 50% gone; Dirinaria mostly gone below face, 
W side: Phyllopsora all gone; alga only at top now, 
ROMFEYLCIIB. 
