Does the land under the Amazon forest rise due to biological build up?
I'm not sure I'll be able to explain this properly. I'm not even 100% sure this is a geology question. But here it goes.
I would think Amazon forest would have the highest biomass per area on land anywhere on Earth and all those living things do what living things do and die. That would get decomposed of course, and become dirt at the end essentially. Does that cause the land to rise? Or does all the carbon/water/nitrogen cycles reconstitute a lot back to biomass, and the rest get eroded by the gigantic water basin of the Amazon River and the land level keep the same? Or does the river go even further, and the land is actually lowering in a lot of places?
Long story short, what is the effect of the crazy biological activity on the altitude of the land?