Szentgál radiolarite : 2D documentation Middle Jurassic
Szentgál radiolarite : 3D documentation Middle Jurassic
Chocolate' flint : 2D documentation Upper Jurassic (Oxfordian/Kimmeridgian)
Scandynavian Senonian Flint : 2D documentation Maastrichtian
Scandynavian Senonian Flint : 3D documentation Maastrichtian
Siliceous hypertrophy : 3D documentation Upper Jurassic
Chocolate' flint : 3D documentation Upper Jurassic (Oxfordian/Kimmeridgian)
Siliceous hypertrophy : 2D documentation Upper Jurassic