Monday, May 01, 2006
I was thinking about measuring lichen buildup on the rocks in a rock pile - perhaps by measuring the diameter of lichen patches. But where it would get interesting is in comparing measurements with those of other rocks and other structures at the same location. For example, fixed boulders can be expected to have the largest lichen patches. Rocks in a rock pile might have smaller patches, rocks in a nearby stone wall might have patches the same size as in the rock pile. You would not get a sense of absolute age of rock piles but you might get a sense of the relative ages of different things at the site.