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 had been on hold since 2008 due to the recession and was cancelled in its current form all together in July 2013 when Sheffield City Council decided to relieve developer Hammerson of their development rights. Sheffield City Council announced in late 2013 that they will proceed with their own development scheme to replace the axed Sevenstone project. Sheffield City Centre is host to a multitude of events, ranging from small farmers markets to international sporting events. Sheffield International Venues and Sheffield Theatres maintain the larger venues whilst several others are managed privately. Ponds Forge International Sports Centre, on the edge