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The Cenotaph, in Whitehall, London, is made from Portland stone. Portland stone is a limestone geological formation (formally named the Portland Stone Formation [1]) dating to the Tithonian age of the Late Jurassic that is quarried on the Isle of Portland in Dorset, England. [1] The quarries are cut in beds of white-grey limestone separated by ...
It is divided into two formations, the Portland Stone Formation (or 'Portland Limestone Formation') and the underlying Portland Sandstone Formation (or 'Portland Sand Formation'). The Portland Stone Formation is further divided into a lower Portland Chert Member and an upper Portland Freestone Member, both of which are limestones.
Portland Stone quarry on the Isle of Portland, Dorset. Transgression of the Paleogene sediments over the Wetterstein Limestone of the Silicic Superunit, Western Carpathians, Slovakia. Gibraltar limestone : North face of Rock of Gibraltar .
Portland is a central part of the Jurassic Coast, a World Heritage Site on the Dorset and east Devon coast, important for its geology and landforms. Portland stone, a limestone famous for its use in British and world architecture, including St Paul's Cathedral and the United Nations Headquarters, continues to be quarried here.
The Isle of Portland has been extensively quarried for Portland stone for centuries. Portland stone is an oolitic limestone that is greatly valued as a building stone because it has an attractive appearance, is easy to work, and resists weathering. It has long been used in the construction of important buildings both in the UK and around the world.
Limestone is widely considered one of the more affordable natural stone options for a fireplace surround, though the actual cost of the material can vary widely depending on the appearance of the ...
The overlying Portland stone is a distinctive white oolite containing thick-shelled fossils and marine algae. [40] The marine algae, which formed large reefs, are responsible for the occasional stacked and arched bands in the formation and are best viewed in the Roach, an extremely fossiliferous limestone confined to the north of Isle of ...
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