Slate industry in Spain Slate industry in Spain 90% of Europes's natural slate used for roofing originates from the slate industry in Spain, with the region of Galicia being the primary source of production. Slate is a fine-grained metamorphic rock that splits into thin, smooth-surfaced layers. Metamorphic rock is rock which was once igneous or sedimentary and has been subsequently subjected to heat and pressure in varying degrees thereby altering its composition, structure and appearance. It is used extensively in the building industry, particularly for roofing tiles. The production of slate is estimated at 4 million tons per year. Galicia is situated on the
Inanimate whose the English Language" of 1860: "At present, the use of "whose", the possessive of "who", is pretty generally confined to persons, or things personified, and we should scruple to say, 'I passed a house "whose" windows were open.' This is a modern, and indeed by no means yet fully established distinction." Henry Bradley in the "Oxford English Dictionary" asserted "usually replaced by "of which", except where the latter would produce an intolerably clumsy form". Other grammarians began noticing discrepancies between usage and the assertions of those who prescribed against the inanimate "whose". The American Goold Brown, in his "The Grammar