RockBoar.com

     Blues rock is a hybrid musical genre combining bluesy improvisations over the 12-bar blues and extended boogie jams with rock and roll styles. The core of the blues rock sound is created by the electric guitar, bass guitar and drum kit, with the electric guitar usually amplified through a tube guitar amplifier, giving it an overdriven character.

      Blues rock was characterized by bluesy improvisation and long jams.

     A classic example of blues rock is Eric Clapton's "Crossroads" first released on Cream's "Wheels of Fire" album. It was adapted from Robert Johnson's "Cross Road Blues" and "Traveling Riverside Blues".

^{Source: http://en.wikipedia.org/wiki/Blues_Rock}