Speed dating for the over sixties
This is usually the fate of every plot of land which remains above sea level long enough.
Large areas of Canada, for instance, have been eroded down to the Precambrian basement rock!
I suspect that most of them belong to plants which were chopped down years ago.
There's not much down there in that clay to completely rot them away.
Fewer roots now reach the parent rock, and, in the bottom layers, the organic content of the soil is greatly reduced.
That means less chemical weathering from bacteria and fungi.
Those "scientific" creationists who trot this plum about must be delirious!
Do they really believe that we should wind up with x miles of topsoil (or some such nonsense) after billions of years?
Under unusual conditions a layer of topsoil can be "fossilized," even to the point of preserving the three-dimensional shape of tree leaves, as is the case at Yellowstone National Park.) In the long run, buried sediments are usually cemented into sedimentary rock, which brings us back to the beginning of this cycle.Forget about billions of years of soil accumulation!Where sediment is neither being collected nor eroded, soils necessarily take their mineral components from the underlying parent rock.The sediment added to our patch of land may be great for building new soil, but if it accumulates too quickly it will merely bury the existing soil. In any case, the old topsoil, now compressed and deeply buried by sediment and soil, is no longer turned over by earthworms or small animals.
It is deprived of oxygen and fresh organic material, such as rotting leaves.Such sediment, even if from nearby hills, would normally carry very little organic material as the weathering slopes, themselves, would not have much to begin with.