These are a couple of the early styles of Rock and Roll during the 1950s.
Rockabilly
Rockabilly was one of the earliest styles of rock and roll music and it was made up of a combination of the blues, country and gospel music styles.
Soul
Soul music is the combination of gospel and doo-wop styles. Soul music was born from black artists during the time of the Civil Rights movement. As the Civil rights movement so did it's popularity among black people.
Surf
Surf was one of the earliest styles of rock and roll music and was commonly called the first wave because of it's initial rise and fall. Surf is an instrumental type of music meaning that there is no singing. It is also something you can dance to so like rock and roll surf was aimed at youth.