Thank you very much for this elaborate explanation! I was even aware of that clay part, since I know the grain size distribution “triangle”? I don’t know, what this could be in English.

I am no expert in soil science. Could some of you pros explain how this can happen? I have never seen prismatic structure IRL and I had always assumed if that occurs it could only happen on the A horizon?

Cherry laurel is listed on a so called grey list. It is a plant that is very popular because it is very robust and evergreen. But it is also invasive: birds eat the berries and can spread the seed. So the shrub can mess up ecosystems and it is difficult to get rid of.

I also think, this is a cherry laurel. They are forbidden to be planted in Germany.