Southern rock is a subgenre of rock music and a genre of Americana. It developed in the Southern United States from rock and roll, country music, and blues, and is focused generally on electric guitar and vocals. Although the origin of the term Southern rock is unknown, "many people feel that these important contributors to the development of rock and roll have been minimized in rock's history." The Allman Brothers Band played Southern rock with long jams. The Marshall Tucker Band was also known to incorporate jazz instruments such as the flute and saxophone into their jams. Loosely associated with the first wave of true Southern rock were acts like The Allman Brothers Band, Little Feat, ZZ Top and Lynyrd Skynyrd. In the early 1970s, another wave of hard rock Southern groups emerged. Their music emphasized boogie rhythms and fast guitar leads with lyrics extolling the values, aspirations - and excesses - of Southern working-class young adults, not unlike the outlaw country movement. The music itself is heavily influenced by the late '60s electric rock music scene. The 1990s also saw the influence of Southern rock. The Black Crowes, who were from Atlanta, Georgia, blended the sound of bands like Led Zeppelin and the Rolling Stones with the southern touch of the Allman Brothers Band. Additionally, alternative rock groups like Kings of Leon combine Southern rock with garage rock, alt-country, and blues rock. Several of the original early 1970s hard rock Southern rock groups are still performing today, such as Lynyrd Skynyrd, The Marshall Tucker Band, Molly Hatchet, ZZ Top, and Wet Willie.