Traditional metal working in Mexico more. Important metal working centers include Taxco for silver, Santa Clara del Cobre for copper, Celaya for tin and Zacatecas for wrought iron. Metal working in Mesoamerica, especially of silver, gold and copper was advanced by the time the Spanish arrived, mostly concentrated in the modern states of Michoacán, Oaxaca and Guerrero. The mining and working of metals probably came to Mesoamerican cultures from the south. Metal working was principally in gold, silver, tin and lead, with some copper work known in what is now Michoacán. Gold was generally obtained in powder or pellet form in rivers and streams from
Alternative metal nu metal. Nu metal expands the alternative metal sound, combining its vocal stylings and downtuned riffs with elements of other genres, such as hip hop, funk, thrash metal, hardcore punk and industrial metal. The genre is generally considered a fusion between alternative rock and heavy metal, although Allmusic states "alt-metal is a far-reaching term that has been used to describe everyone from Hammerlock to Neurosis to Ministry to Limp Bizkit". They also remarked that alternative metal was originally "a style united by its nonconformist sensibility rather than any immediately classifiable sound." One of the main characteristics of alternative metal and