[thaumasiotes]

> It takes 600 to 3,000 years for 6 inches of topsoil to develop naturally, as it generally requires 100 to 500 years to form just a single inch.

I very much doubt those statements can both be true. It would have to be the case that the amount of time required to deposit one inch of soil is independent of the amount of soil already in place, which seems extremely unlikely.

[toomuchtodo]

https://pubs.usgs.gov/pp/0454h/report.pdf (page 5, Start at “Introduction”)

https://news.un.org/en/story/2022/07/1123462 (“It also takes around a thousand years to create just a few centimetres of topsoil and to help land restoration.”)