Biological processes and rockface destruction

 

Just came across this on Facebook, in quite another context.  It struck me as particularly apt, given that some people persist, in spite of everything, in believing that Craig Rhosyfelin is the site of a Neolithic bluestone monolith quarry.  

https://brian-mountainman.blogspot.com/2018/05/biological-processes-at-rhosyfelin.html

https://brian-mountainman.blogspot.com/2020/09/biomechanical-processes-at-rhosyfelin.html

https://brian-mountainman.blogspot.com/2015/03/the-rhosyfelin-shrubbery.html