Chert : 2D documentation Jurassic/Cretaceous from Miocene sediments
Chert : 3D documentation Jurassic/Cretaceous from Miocene sediments
Scandynavian Senonian Flint : 3D documentation Maastrichtian
Scandynavian Senonian Flint : 2D documentation Maastrichtian
Świeciechów flint : 2D documentation Turonian
Świeciechów flint : 3D documentation Turonian