Geography of Sheffield county, from bituminous (ideal for domestic heating) to "Thick Coal", of a semi-anthracitic quality, appropriate for use in iron-smelting and in engine furnaces. Associated with the Upper Coal Measures were valuable iron ore deposits, occurring in the form of nodules. Large quantities of locally occurring fireclay were also exploited, as well as ganister (a clay used to make refractory furnace linings). The city of Sheffield derives its name from the River Sheaf which Until the 17th century was written as "Scheth" or "Sheath". Sidney Oldall Addy equates the origins of this word with the Old English "shed" (as in "water-shed")
Sheffield City Centre released to the public in spring 2014. The Riverside Exchange is a new, large business district in the north of the city centre and is home to organisations such as Irwin Mitchell and the UK Border Agency. The West End district of the city centre is home to many independent shops, bars and coffee shops - particularly catering for the large student population in the area. Devonshire Green, a small landscaped district park is host to the main stage of the annual Sheffield Tramlines Festival as well as outdoor cinema screenings throughout the summer. Sheffield City Centre Sheffield City Centre