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")
Netherthorpe, Sheffield within it. In 2009, the Opal 3 complex was built on Hoyle Street with accommodation for 992 students with leisure facilities and disabled access. Located within Opel 3 is the English Language Teaching Centre which is part of Sheffield University and helps students who are having problems with the English language. There are no GP practices within the immediate Netherthorpe area with the nearest ones being the Upperthorpe Medical Centre on Addy Street and the Sheffield City GP Health Centre on Broad Lane. There is one public house within the suburb: the White Hart on St Philips Road, a traditional