Here is a beatufull plate of this typical index fossils from the Ordovician sediments of the famous Abereiddy Bay, Pembrokeshire. Graptolites are very imported for the stratigrafic zoneation of the British Ordovician rocks. | |||
Location: | Abereiddy Bay, Pembrokeshire, South Wales,UK | ||
Size of plate: | about 106 x 32 mm | ||
Age: | Ordovician, Llanvirn, Hope shales, Didymograptus murchisoni -Biozone (about 470 mill. y.o.) |