During the 1970s, a number of diverse styles emerged in stark contrast to mainstream American popular music. Though these genres were not largely popular in the sense of selling many records to mainstream audiences, they were examples of "popular music", as opposed to folk or classical music. In the early 1970s, African Americans and Puerto Ricans in New York City developed hip hop culture, which produced a style of music also called "hip hop". At roughly the same time, Latinos, especially Cubans and Puerto Ricans, in New York also innovated salsa music, which combined many forms of Latin music with R&B and rock. The genres of punk rock and heavy metal were most closely associated with the United Kingdom in the 1970s, while various American derivatives evolved later in the decade and into the 1980s. Meanwhile, Detroit slowly evolved a series of electronic music genres like house and techno that later became a major part of popular music worldwide.