Can we talk about the hidden layers at the Cahokia Mounds site?
I drove down to the Cahokia Mounds in Illinois last weekend, and something really caught my eye. I've been there before, but this time I noticed these small erosion patterns near the base of Monks Mound that seemed to reveal different soil colors. It got me thinking about how the Mississippian people built these up in stages over hundreds of years, and you can actually see the old ground surfaces if you look close enough. I spent like an hour just walking around the back side where they have that cutaway section, and you can spot these dark organic layers between lighter clay bands. That's where they stopped building for a while and grass grew over before they added more dirt on top. The signs at the site mention it briefly, but I wish they had a diagram showing all those hidden layers. Has anyone else spotted where they can see the different construction phases at a mound site, or know a good book that breaks down the stratigraphy?