Thought I said this....who knows how old a forest is?
Many forest(s) in my state (AL now) were made by CCCs planting pine trees.
Many forests have been chopped down due to loggers and many replanted.
Sit back for story time:
About 15 or so years ago in Colorado I was horseback riding into some woods, this was a 20 mile ride.
After 5miles in, I decided to go off the beaten path and follow a small creek bed (5ft wide) as far as it would go.
I rode for about 2 hours, sometimes using the creek to ride in if the trees or bushes got too thick.....eventually the trees were thinning out and the creek was running clearer and had narrowed down to about 2 ft across. After another hour the creek ended in a small pool and was flowing from some rocks, like a natural spring. I dismounted and walked a little further away from the spring, until I saw a small clearing, in the clearing was some kind of bricks and a wooden shanty missing all but 2 of its sides. (Looks like a fire took out the rest.) There was a type of chimney and fireplace, blackened and sooty and I poked around a little finding nothing exciting and decided to look around the clearing and saw a narrow trail through the trees and followed it until it dead ended. I went back to the shanty and found 2 more trails, one dead ended and another seemed to go on ... after about 30mins a bear scared me off. (Yes, a BEAR!) I high tailed my butt back to my horse and quickly left!
I later asked my grandfather about this shanty. He said he didn't know and to ask my great grandmother. (She is full Sioux Indian and had ran amok in these woods since she was a girl) She said it once belonged to a trapper. And that it had been used by trappers for the last 75 or so years that she was aware of. There have also been boys who camped there, etc. It was rumored to have been used by a "wanted" man in the late 1800's who had robbed a local post office. I don't know why a post office, my grandmother wasn't sure either.
Anyway, I love story hour don't you? I guess you never know what once was in the woods.
I also wish I was a metal detector enthusiast back then!
A little history lesson into the woods you would like to detect could give you little tidbits on whether it was used by trappers, low-men, boyscout, Indians...etc.
I like to believe there are no true virgin "forests" in the U.S. Granted there may be acres undiscovered in the past that WE know of, but who knows about uncharted history?
You wouldn't believe the acreage indians, trappers and hunters can cover.