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The Group comprises the Upper Eday Sandstone Formation, Eday Marl Formation, Middle Eday Sandstone Formation, Eday Flagstone Formation, Lower Eday Sandstone Formation and the Hoy Sandstone Formation laid down in the shallow Orcadian Basin during the Givetian stage of the Devonian period. The sediments vary from fluvial to lacustrine to lagoonal.
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 islands’ history before human occupation is part of the geology of Scotland.) Although some records referring to Orkney survive that were written during the Roman invasions of Scotland, “prehistory” in northern Scotland is defined as lasting until the start of Scotland's Early Historic Period (around AD 600).
In 1564 Lord Robert Stewart, natural son of James V of Scotland, who had visited Kirkwall twenty-four years before, was made sheriff of Orkney and Shetland, and received possession of the estates of the udallers; in 1581 he was created earl of Orkney by James VI, the charter being ratified ten years later to his son Patrick, but after Patrick's ...
The Dwarfie Stane is a megalithic chambered tomb carved out of a titanic block of Devonian Old Red Sandstone located in a steep-sided glaciated valley between the settlements of Quoys and Rackwick on Hoy, an island in Orkney, Scotland. [1] The stone is a glacial erratic located in desolate peatland. [2] The site is managed by Historic ...
The Stone of Setter is an extremely tall sandstone monolith of irregular shape. It dates to the Late Neolithic or Early Bronze Age, probably around 2nd millennium BC. [ 3 ] It measures approximately 4.5 m (15 ft) in height, 2.1 m (6 ft 11 in) in width, and the stone varies in thickness from 0.9 m (2 ft 11 in) at the base to 0.35 m (1 ft 2 in ...
The eponymous Skaill knife was a commonly used tool in Skara Brae; it consists of a large stone flake, with a sharp edge used for cutting, knocked off a sandstone cobble. [46] This neolithic tool is named after Skara Brae's location in the Bay of Skaill on Orkney. [47] Skaill knives have been found throughout Orkney and Shetland.
Seventy-five per cent of Orkney's population live on the island, which is more densely populated than the other islands of the archipelago. The lengthy history of the island's occupation has provided numerous important archaeological sites and the sandstone bedrock provides a platform for fertile farmland.