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 run through the city centre, the Cathedral Square stop forming a focal point for operations. National Express coaches serve Sheffield city centre direct through the Sheffield Interchange. The 560/564 service connects directly to London Victoria Coach Station (only occasionally stopping at Chesterfield and Milton Keynes en route). Numerous other services connect Sheffield to destinations across the UK and all of them depart/arrive at Sheffield Interchange. Sheffield city centre is home to the Sheffield Interchange. In recent years it has lost importance as SYPTE have constructed several ‘mini-interchanges’ around the city centre to accommodate shopping and other activities the areas for