Ries crater: spallation and mesoscopic deformations ...
Ries crater: spallation and mesoscopic deformations. ... often in the middle, of the cobble. A complete cutting up of the geodes is rare, and widely open fissures indicating tensile stress are abundant. All this also opposes a joint cataclastic deformation of solid clasts and soft matrix. ... “Pook’s pebble” from the Ries crater Bunte ...