Bob Miner sent me the following photo that gives us a closer look at the huge pile.
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This is about rock piles and stone mound sites in New England. A balance is needed between keeping them secret and making them public. Also arrowheads, stone tools and other surface archaeology.
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Bob Miner told me a little history of this pile that I want to share with you.
ReplyDeleteBob says that about 64 years ago this pile was covered with grape vines and loaded with grapes.
About 35 years ago AT&T came through to create a right-of-way and bulldozed boulders into the pile.
About 20 years ago goats ate up all the grapes and then bittersweet covered the pile to the treetops.
Three years ago Bob cleaned up all the bittersweet and rebuilt part of the pile from the damage AT&T caused.
Phew! I guess I was wrong that this looked like a young pile. But it is an interesting point that plant growth on a pile, when removed, can make a pile look you and lacking in lichen.
ReplyDeleteSo the lichen statement is wrong too. Absence of lichen is possible if there is plant growth instead.
I think you're exactly right Peter. What the grape vine likely did was cut off the sunlight that the lichen's algal partner needed for photosynthesis. No sunlight, no slow lichen growth.
ReplyDeleteSometimes too much sunlight can cause the same effect -- by drying out the substrate so quickly that there is no usable moisture. No moisture, no lichen.
There are many other reasons why lichen may not grow too, as I said in my comment in the other post. All of this isn't me talking, either. This is from a good friend of mine who's a biologist and works at the Boston Museum of Science.
I wanted to know more about lichen growth because of my interest in rock piles. I consulted him. He knows his stuff.