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Union Bridge, Aberdeen (geograph 2655061)
Union Bridge is a bridge on Union Street, Aberdeen, Union Street, Aberdeen, Scotland. It is the largest single-span granite bridge in the world, at 130 feet (40 metres). It was built by Thomas Fletcher under some influence from Thomas Telford. It is a Category B listed building with Historic Scotland. History Constructed from 1801–05 as part of Union Street under plans suggested by Charles Abercrombie, it was intended to provide an impressive approach into the city from the south (and west); previously the route had been somewhat circuitous. The bridge crosses the Denburn valley, and Union Terrace Gardens. Alongside the gardens are a dual carriageway and single railway track; originally there was a small roadway and considerable railway workings, with the site being a short distance north of Aberdeen railway station. The bridge was widened in 1908, in a scheme of William Diack, with Benjamin Baker (engineer), Benjamin Baker as consultant, shortly before the latter's death. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granite
Granite () is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous intrusions. These range in size from dikes only a few centimeters across to batholiths exposed over hundreds of square kilometers. Granite is typical of a larger family of ''granitic rocks'', or ''granitoids'', that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF classification), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) contain almost no dark minerals. Granite is nearly alway ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
