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The Hurkar Rocks are a group of rocks outside the harbour of Eyemouth in the Scottish Borders area of Scotland. The rocks become exposed during low tide. The placenames vary from Hurkur, Hurker, Hurkar, Harkar, and Buss Craig Rock. During the Eyemouth Disaster of 1881, a number of ships, returning from out of the storm, were wrecked upon these ...
A rock formation is an isolated, scenic, or spectacular surface rock outcrop. Rock formations are usually the result of weathering and erosion sculpting the existing rock. The term rock formation can also refer to specific sedimentary strata or other rock unit in stratigraphic and petrologic studies.
The Aylesbeare Mudstone Group is an early Triassic lithostratigraphic group (a sequence of rock strata) in southwest England. The name is derived from the village of Aylesbeare in east Devon. The Group comprises the Littleham Mudstone Formation, the Exmouth Mudstone and Sandstone Formation and the underlying Clyst St Lawrence Formation.
Dunglass, just to the west of the town, was the home of the geologist Sir James Hall who, in the Spring of 1788, joined John Playfair and James Hutton in a boat trip from Dunglass Burn east along the coast looking for evidence to support Hutton's theory that rock formations were laid down in an unending cycle over immense periods of time.
The Giant's Causeway (Irish: Clochán an Aifir) [1] is an area of approximately 40,000 interlocking basalt columns, the result of an ancient volcanic fissure eruption. [3] [4] It is located in County Antrim on the north coast of Northern Ireland, about three miles (4.8 km) northeast of the town of Bushmills.
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.
The formations become narrower due to erosion over geologic time scales. The softer rock stratum erodes away creating rock shelters, or alcoves, on opposite sides of the formation beneath the relatively harder stratum, or caprock, above it. The alcoves erode further into the formation eventually meeting underneath the harder caprock layer, thus ...
A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures. [1] The assemblage is typical of what is formed in conditions corresponding to an area on the two dimensional graph of temperature vs. pressure (See diagram in Figure 1). [1]