Baveno-pericline-albite combination twins in "big-feldspar basalt", Horten, the Oslo region.
3, 4

Last summer I tried to find the contact between the bottom layer of the Permian effusives and the underlying Permian sediments on the island Løvøya, 4 km NNW of Horten, but did not succeed in finding the contact in solid rock. In the little bay on the west side of the island the contact was covered by talus, but among the great blocks on the shore I found one that seemed to represent the bottom layer of the basaltic lava series (E1 on the geological maps). One side of this block consisted of a flake of light red sandstone, (2 X 2 X 0.2) m3 in size, and the sandstone contained traces of Permian plant fossils.