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(Topsoil is full of microbes that love to munch away on organic material, and don't forget the earthworms.Those earthworms don't get their calories from rock and clay!Sudden changes in temperature will have a smaller effect on the deeper parent rock.With the exception of the organic content, drawn mostly from the atmosphere, and the larger volume that broken rock takes up (which may raise the soil some distance above the original surface), in situ soils build .The majority, but not all links that can be found in the Bible Studies section are included below.Should you have any questions about any sheets or teaching in general, please do not hesitate to contact us.

Where sediment is neither being collected nor eroded, soils necessarily take their mineral components from the underlying parent rock.

The geologic history of the strata making up the Grand Canyon is as much a history of erosion as it is of deposition!

Consequently, a patch of soil cannot be older than the last local erosion--whenever that might have been.

Thus, topsoil does not accumulate like most sediment, by simply piling up.

In the case of erosion, the topsoil, of course, is removed.

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