The Dalradian Supergroup (informally and traditionally the Dalradian) is a stratigraphic unit (a sequence of rock strata) in the lithostratigraphy of the...

Paleozoic. The oldest Dalradian rocks (the Grampian Group) were deformed and metamorphosed around 750 Ma. The deposition of younger Dalradian sediments continued...

slates are some of its commercial uses. Phyllite is commonly found in the Dalradian metasediments of northwest Arran. In north Cornwall, there are Tredorn...

majority of the rocks within the Cairngorms National Park belong to the Dalradian Supergroup, a thick sequence of sands, muds and limestones that were deposited...

geology. The majority of the rocks within the National Park belong to the Dalradian Supergroup, a thick sequence of sands, muds and limestones that were deposited...

is thought to be unconformably overlain by the Cryogenian to Cambrian Dalradian Supergroup. The supergroup is subdivided into three groups. This group...

metamorphism during the Caledonian orogeny. These older rocks, assigned to the Dalradian Supergroup, lie to the northwest of the northeast – southwest aligned...

Complex have been interpreted as being in stratigraphic continuity with the Dalradian Supergroup, with the ophiolitic rocks (serpentinite, metagabbro, hornblende...

onto the surrounding metamorphic/ igneous complexes formed during the Dalradian period (approximately 480–600 million years ago) with sporadic areas of...

nearby are not usually included. The underlying geology of the islands is Dalradian slate, which was quarried widely until the mid-20th century. Quarry working...