This will happen to all of your Earth unless the ores are given us.
The ores were very generally decomposed to a depth of about 300 feet.
Other ores are converted into oxides and reduced by heating with carbon.
The process of extracting a metal from its ores is called the metallurgy of the metal.
But the greater mass of the ores we melt have a far less produce than this.
Most of the ores obtained in Pennsylvania and New York are magnetite.
For this purpose they compete with the ores of Spain and Cuba.
Some ores smelt and flow so easily that a flux is not required.
Its origin is referred to in connection with the Goldfield ores (p. 230).
In Brazil, the ores have undergone close folding and anamorphism.
12c., merger of Old English ora "ore, unworked metal" (related to ear "earth," cognate with Low German ur "iron-containing ore," Dutch oer, Old Norse aurr "gravel"); and Old English ar "brass, copper, bronze," from Proto-Germanic *ajiz- (cf. Old Norse eir "brass, copper," German ehern "brazen," Gothic aiz "bronze"), from PIE *aus- "gold" (see aureate). The two words were not fully assimilated till 17c.; what emerged has the form of ar but the meaning of ora.
