Nice finds Al.it was a ring of dirt about two ft high and 20 ft across with the depression in center actually being about ground level,a couple of the buttons were slightly depressed in center but some appeared to be rings on flat ground.When i dug in center there was about six inches of humus and then immediately black grimy decayed charcoal with lumps of intact charcoal in it.Now i would assume a charcoal site would have charcoal from oak/hickory which is what i think they used for charcoal for furnaces??? A tar pit would have pine charcoal.You would have to have it analyzed I imagine to tell the difference.Does anyone know what wood for sure as used to make charcoal for a furnace? There was a very old wagon road going through the area and several of the pits were right next to it.A very old road by the looks of it.An almost unused trail now. Oh and there was no clay.very fine sugar sand outside the pits,charcoal in them but I didn't go deep,maybe a foot.
Tar kilns had clay bottoms that the liquified tar would flow down to before running through a pipe or trough into a bucket. What you visited might have just been a charcoal kiln ("Pit").it was a ring of dirt about two ft high and 20 ft across with the depression in center actually being about ground level,a couple of the buttons were slightly depressed in center but some appeared to be rings on flat ground.When i dug in center there was about six inches of humus and then immediately black grimy decayed charcoal with lumps of intact charcoal in it.Now i would assume a charcoal site would have charcoal from oak/hickory which is what i think they used for charcoal for furnaces??? A tar pit would have pine charcoal.You would have to have it analyzed I imagine to tell the difference.Does anyone know what wood for sure as used to make charcoal for a furnace? There was a very old wagon road going through the area and several of the pits were right next to it.A very old road by the looks of it.An almost unused trail now. Oh and there was no clay.very fine sugar sand outside the pits,charcoal in them but I didn't go deep,maybe a foot.
Gabe I hadn't realized why you asked me about clay bottoms but I just read something last night that states that tar kilns were lined with clay I presume so the tar doesn't sink into the sand or so the sand don't contaminate the tar.I did not dig down far enough to confirm weather there was clay or not and stopped as soon as i hit charcoal.When I investigate the pits on my next days off wed/thur I will take a full sized shovel(I was using an army etool) and will dig through the charcoal to see what I hit.There is no clay anywhere near these pits,they would have hauled it in up the old road I was following.Tar kilns had clay bottoms that the liquified tar would flow down to before running through a pipe or trough into a bucket. What you visited might have just been a charcoal kiln ("Pit").
I have found a couple of areas down here like that in Peaslees and another area in Union Lake wma.
Up around Sleep Creek (of Mullica fame ) too. These things are way more abundant than I had realized. This new lidar is revolutionary.I have found a couple of areas down here like that in Peaslees and another area in Union Lake wma.