Rock n Roll vs Rock

I believe that there is a difference between Rock n roll and rock music. Even though rock music stems from rock n roll i think there is a huge difference. When i think of rock n roll i think of bands and artists like Elvis, Johnny Cash, and Chuck Berry. When i think of rock music i think of rock music i think groups like The Rolling Stones, Jimi Hendrix, The Beatles, and Led Zeppelin.

I think the two types of genres has a different type of sound that made them different. I think the time period has an influence in the distinction of the type of music. Rock has a more electric feeling then rock n roll. Rock n roll was either derived from a r&b or a country side of theme. I think rock has more of a role wit the electric guitar many rock bands having more guitar solos which also differentiates from rock n roll.