Canada, Greenland, Ireland, Norway, United Kingdom
Extent
700 km (430 mi)[1]
Hutton's angular unconformity at Siccar Point where 370-million-year-old Devonian Old Red Sandstone overlies 435-million-year-old Silurian greywacke.[2]
Old Red Sandstone, abbreviated ORS, is an assemblage of rocks in the North Atlantic region largely of Devonian age. It extends in the east across Great Britain, Ireland and Norway, and in the west along the eastern seaboard of North America. It also extends northwards into Greenland and Svalbard.[3] These areas were a part of the paleocontinent of Euramerica (Laurussia). In Britain it is a lithostratigraphic unit (a sequence of rock strata) to which stratigraphers accord supergroup status[4] and which is of considerable importance to early paleontology. The presence of Old in the name is to distinguish the sequence from the younger New Red Sandstone which also occurs widely throughout Britain.
^Cite error: The named reference Barclay was invoked but never defined (see the help page).
^Cite error: The named reference FieldExcursion was invoked but never defined (see the help page).
^Friend, P.F. and Williams, B.P.J. (eds) 2000 New Perspectives on the Old Red Sandstone. Geological Society, London, Special publications 180 p1,35
^http://www.bgs.ac.uk/Lexicon/lexicon.cfm?pub=ORS entry in BGS on-line rock lexicon
OldRedSandstone, abbreviated ORS, is an assemblage of rocks in the North Atlantic region largely of Devonian age. It extends in the east across Great...
RedSandstone may refer to: Sandstone appearing red due to the inclusion of iron oxides (hematite) OldRedSandstone, a British lithostratigraphic unit...
The New RedSandstone, chiefly in British geology, is composed of beds of redsandstone and associated rocks laid down throughout the Permian (300 million...
western side of Hoy lead to rapid erosion of the coast. The Old Man of Hoy is a redsandstone stack, perched on a plinth of basalt rock, and one of the...
characterised by younger Devonian rocks which are assigned to the OldRedSandstone. A variety of igneous rocks intrude the Dalradian sequence, including...
the Devonian OldRedSandstone facies of Europe. Primary red beds may be formed by the erosion and redeposition of red soils or olderred beds, but a fundamental...
walls and slate fencing. The OldRedSandstone of the Anglo-Welsh Basin comprises a variety of Devonian age sandstones (alongside other rocks unsuitable...
cross-bedded sandstones of the Eask Sandstone Formation, dating from the Devonian period and traditionally referred to as the OldRedSandstone. Dunmore Head...
early Silurian age can be found on Anglesey. A narrow outcrop of OldRedSandstone extends from Dulas Bay on the east coast, inland to the northern edge...
found at a depth of between 4 and 7 km. Other than a small outlier of OldRedSandstone, there are no younger solid rocks within the National Park. The ice...
remarks on the Devonian fossil insects from the Rhynie chert beds, OldRedSandstone. Transactions of the Entomological Society of London 76:65-71 Hirst...
borders) Cornbrash Sandstone: North Rhine-Westphalia, Lower Saxony Elbe Sandstone: Germany (Saxony) and the Czech Republic Red Main Sandstone: Hesse, Baden-Württemberg...
that continent, along with the Caledonian orogeny that formed the OldRedSandstone Continent when the continents Baltica and Laurentia collided in the...
has been called the "OldRed Age", after the red and brown terrestrial deposits known in the United Kingdom as the OldRedSandstone in which early fossil...
uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white...
built of large cut stones from the Dingle Beds of the Upper Silurian OldRedSandstone. Charles Smith, who discovered the edifice in 1756, described the...
of the OldRedSandstone found principally along the Moray Firth coast and in the Orkney islands. These rocks are around 400 million years old, and were...
Carrauntoohil is composed of sandstone particles of various sizes which are collectively known as OldRedSandstone. OldRedSandstone has a purple-reddish colour...
Upper Devonian and Lower Carboniferous breccias, sandstones, and conglomerates of the OldRedSandstone overlying deeply eroded, near-vertical, greyish...
county boundary west of Kielder Water. Within the Border Group the Fell Sandstone Formation reaches up to 370m thickness and is locally prominent around...
Westminster around 1300, has been confirmed by geologists to be a "lower OldRedSandstone", quarried in the vicinity of Scone, and thus has not been transported...