Tabular chert of the Abensberg-Arnhofen type : 3D documentation Upper Jurassic
Tabular chert of the Abensberg-Arnhofen type : 2D documentation Upper Jurassic
Chocolate' flint : 2D documentation Upper Jurassic
Świeciechów flint : 3D documentation Turonian
Chocolate' flint : 3D documentation Upper Jurassic
Świeciechów flint : 2D documentation Turonian