Meldon Geology and Geomorphology case study

The Meldon area is situated on the north-west corner of Dartmoor granite massif, south-west of the town of Okehampton and is one of the most important geological locations in the UK. It demonstrates, par-excellence, the effects of contact metamorphism and mineralisation associated with the intrusion of a major granitic body, but is also famous for its structural geological features, including the well-known ‘Meldon Anticline’ - a southwards inclined antiform dating from the late Carboniferous Variscan Orogeny. A range of other geological and geomorphological features are also well developed.

1A. Introduction to the geology and geomorphology of the Meldon area (including access and conservation)

1B. Late Lower to Upper Carboniferous: Crackington Formation (Culm Basin ‘autochthon’ / ‘parautochthon’)

1C. Greystone Nappe: Lower Carboniferous, Lower Culm Group (‘allochthon’)

1D. Blackdown Nappe: Late Lower to Upper Carboniferous, Bealsmill Formation (‘allochthon’)

1E. The Dartmoor granite and associated igneous rocks

1F. Metalliferous mineralisation

1G. General tectonic evolution and structural geology

1H. Quaternary

1I. The geological landscape of Meldon

1J. Glossary