Dorsal Atlântica was a Brazilian thrash metal band, founded in Rio de Janeiro, in 1983. They were pioneers of the Brazilian Thrash Metal scene, being acknowledged as an influence to many other bands including Sepultura and Korzus.
Some guys from Sao Jose dos Campos (close to Sao Paulo) had enough from their bands ATROZ; ETHER and METAFEL, and founded in 1985 ATTOMICA, including the brothers Andre (b) and Pyda Rod (g). The first songs had portuguese lyrics. Later they managed to participate on the first "Rock Brigade" compilation.
VULCANO was one of the first old school Black Metal bands, and the pioneer of extreme metal across South America, since 1981. Their first official material was released in 1983, when the band did not practice an extreme metal sound yet.