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The Old Red Sandstone has been widely used as a building stone across those regions where it outcrops. Notable examples of its use can be found in the area surrounding Stirling, Stonehaven, Perth and Tayside. The inhabitants of Caithness at the northeastern tip of Scotland also used the stone to a considerable extent. Old Red Sandstone has also ...
2.1 Old Red Sandstone. 2.2 ... a series of significant landscape features around which the Northumberland ... 1:50,000 scale geological map series sheets (England and ...
The Old Red Sandstone is a series of red sandstones, marls and conglomerates. It rises as an anticline in the Mendips and appears in the Avon Gorge and at Portishead. Carboniferous Limestone, of marine origin, covers the sandstone and appears in the Avon Gorge and at Weston-super-Mare where it contains volcanic rocks. [37]
Sketch geological map of Orkney. The geology of the Orkney islands in northern Scotland is dominated by the Devonian Old Red Sandstone (ORS). In the southwestern part of Mainland, this sequence can be seen to rest unconformably on a Moinian type metamorphic basement.
The Old Red Sandstone was deposited across much of central and southern England. Sea levels varied considerably at this time with the coastline advancing and retreating from north to south across England. The Old Red Sandstone of Devon gave the period its name. [5]
The chalk basin has been infilled with a sequence of clays and sands of the more recent Paleogene Period, then Neogene Period (1.6 to 66.4 million years old). Most significant is the stiff, grey-blue London Clay , a marine deposit which is well known for the fossils it contains and can be over 150 metres thick beneath the city.
The Old Red Sandstone extends back into the late Silurian period and forward into the earliest part of the Carboniferous period. The familiar red colour of these rocks arises from the presence of iron oxide but not all the Old Red Sandstone is red; colours can range from grey and green through red to purple.
Geology of Wales and South West England; map South Wales is an area with many features of outstanding interest to geologists , who have for long used the area for University field trips. This varied and accessible region has provided a written record of geological interest that dates to the 12th century, when Giraldus Cambrensis noted pyritous ...