In 1972 Deep Purple released one of their biggest albums, "Machine Head" wich features their most famous song "Smoke On The Water" with its iconic riff that probably everybody knows.
Hope you don't mind @derthomas but I'm gonna throw this one in the ring for your #70sHardRockTuesday even though it's a brand-spanking-new release. It's more 70s than 70s without being mere retro tosh. Tarot's new tune is a banger!
In 1974 #Queen released 2 albums: "Queen II" and "Sheer Heart Attack". Both are among my favourites.
On #SheerHeartAttack you will find a lot of guitar heavy tunes and trademark harmonies. Also one of the first #SpeedMetal songs ever recorded (Stone Cold Crazy).
My favourites from the album are Brighton Rock and...