Eddystone Lighthouse
Overview
 
Eddystone Lighthouse is on the treacherous Eddystone Rocks, 9 smi south west of Rame Head
Rame Head
Rame Head is a coastal headland, southwest of the village of Rame in southeast Cornwall, United Kingdom.-History and antiquities:The site was used for a hill fort in the Iron Age. The headland has a prominent chapel, dedicated to St Michael, accessible by a steep footpath...

, United Kingdom. While Rame Head is in Cornwall
Cornwall
Cornwall is a unitary authority and ceremonial county of England, within the United Kingdom. It is bordered to the north and west by the Celtic Sea, to the south by the English Channel, and to the east by the county of Devon, over the River Tamar. Cornwall has a population of , and covers an area of...

, the rocks are in Devon
Devon
Devon is a large county in southwestern England. The county is sometimes referred to as Devonshire, although the term is rarely used inside the county itself as the county has never been officially "shired", it often indicates a traditional or historical context.The county shares borders with...

 and composed of Precambrian
Precambrian
The Precambrian is the name which describes the large span of time in Earth's history before the current Phanerozoic Eon, and is a Supereon divided into several eons of the geologic time scale...

 Gneiss
Gneiss
Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks.-Etymology:...

.

The current structure is the fourth to be built on the site. The first and second were destroyed. The third, also known as Smeaton's Tower
Smeaton's Tower
Smeaton's Tower is the third and most notable Eddystone Lighthouse. It marked a major step forward in the design of lighthouses. In use until 1877, it was largely dismantled and rebuilt on Plymouth Hoe in the city of Plymouth, Devon where it now stands as a memorial to its designer, John Smeaton,...

, is the best known because of its influence on lighthouse design
Lighthouse
A lighthouse is a tower, building, or other type of structure designed to emit light from a system of lamps and lenses or, in older times, from a fire, and used as an aid to navigation for maritime pilots at sea or on inland waterways....

 and its importance in the development of concrete
Concrete
Concrete is a composite construction material, composed of cement and other cementitious materials such as fly ash and slag cement, aggregate , water and chemical admixtures.The word concrete comes from the Latin word...

 for building.
 
x
OK