Here is a good German source: https://www2.ufg.uni-freiburg.de/d/publ/zimm1.html https://www2.ufg.uni-freiburg.de/d/publ/zimm1.html And here a different one in

Here is a good German source: https://www2.ufg.uni-freiburg.de/d/publ/zimm1.html https://www2.ufg.uni-freiburg.de/d/publ/zimm1.html And here a different one in English: https://web.archive.org/web/20180401081044/http://mygeologypage.ucdavis.edu/cowen/~gel115/ https://web.archive.org/web/20180401081044/http://mygeologyp...