Świeciechów flint : 3D documentation Turonian
Świeciechów flint : 2D documentation Turonian
Lousberg flint : 2D documentation Upper Cretaceous (Maastrichtian)
Lousberg flint : 2D documentation Upper Cretaceous (Maastrichtian)
Lousberg flint : 3D documentation Upper Cretaceous (Maastrichtian)
Lousberg flint : 3D documentation Upper Cretaceous (Maastrichtian)