Tabular chert of the Baiersdorf-type : 3D documentation Tithonian/Upper Jura
Chocolate' flint : 3D documentation Upper Jurassic
Chocolate' flint : 3D documentation Upper Jurassic
Chocolate' flint : 3D documentation Upper Jurassic
Chocolate' flint : 2D documentation Upper Jurassic
Chocolate' flint : 2D documentation Upper Jurassic
Chocolate' flint : 2D documentation Upper Jurassic