| Lichen
(You can click on each picture to see a larger version)
 Growing
on the surface of this rock is a lichen. Lichens are unusual organisms
that often grow on exposed rock surfaces. They are composed of a fungus
and an algae living and growing together. There are several varieties of
lichen, and in the autumn lichen turn various colors.
Lichen is the favorite food of caribou and musk oxen. |
