Banded flint : 3D documentation Upper Jurassic (Oxfordian/Kimmeridgian)
Cretaceous flint from Rijckholt-St.Geertruid mine : 2D documentation Upper Cretaceous (Maastrichtian)
Banded flint : 2D documentation Upper Jurassic (Oxfordian/Kimmeridgian)
Cretaceous flint from Rijckholt-St.Geertruid mine : 3D documentation Upper Cretaceous (Maastrichtian)