Herr D. Reichmuth presents a whole website full of continental megalithic info, in German.
This link goes to the page listing sites in the Canton of Grabunden, with links to a set of pages detailing Carschenna found just under the word ‘Schalensteine‘.
woohoo , thanks Hob .
I know it's an old post but our recent local investigation seems to point to the rock being a kind of map ..
SImon