Phyllograptus angustifolius Hall 1858.
Palm sized slab of black shale. One surface has 8 silver coloured Graptolites. The reverse shows another 3 specimens. From the famous locality of 'Graptolite valley'.
Ordovician, Llanvirn Series, Murchisoni Zone.
Graptolite Valley, Slemmestad, Oslofjord, Norway.
Matrix : 15 x 10 cm.
