look at this fossilized tree.very interesting.my 2cents here ..going on this one picture.look at the but end of this tree. you can see its 'flattened' and it ends at a very squared off point. also look at up part way in that section it looks almost like a crosscut of some type...where people cutting this section off? the flattened part was probably people riving off sections to use as boards like natives did up PNW coast did and built plank houses.