How deep is the deepest soil on earth?

Manny peoples wonder and now I ask: what is the depth of the deepest soil on Earth, counting only the depth of the soil itself, not water above it or the elevation? I have a feeling that the answer to this is at the bottom of one of the rift valleys such as the Dead Sea or Lake Baikal which are said to have thousands of feet of sediments at the bottom of them. While Wiki tells me this much, the webz don’t seem to have a source for what is the deepest of all.

I also wonder what the depth of the deepest soil is, not under water? Are there places on land where the dirt goes for thousands of feet down before you hit bedrock?

First off, “soil” has a very specific definition that involves certain processes which are only present in the top dozen meters or so. There’s factors that affect exactly how deep the soil horizons will go, but I personally don’t really know them that well.

In terms of deepest sediments, according to this link, it’s the Caspian basin, with up to 26 kilometers of sediment fill in places: As for what the deepest sedimentary basin that’s not currently under water, I’m not really sure. The Anadarko basin in Oklahoma and Texas is something like 10 kilometers deep, but I’ll bet there’s deeper out there somewhere.

Of course, this doesn’t quite fit the premise of your OP either since by the time you get to the bottom of these basins, it’s not like it’s something loose you could dig up with a shovel. The sediments are going to be fully lithified and possibly even undergoing low-grade metamorphism near the bottom of the really deep basins. But, yes, there are a lot of places on land where you could go thousands and thousands of feet digging through dirt-like material.