This Louder Sound feature traces the roots of 1980s heavy metal back to a set of 1970s classic rock albums, arguing that the genre's key sounds—heavy riffing, fantastical lyricism and proto-metal energy—emerged unintentionally from bands operating in the glam and progressive rock scenes of the earlier decade. The piece highlights how personnel and musical ideas carried directly across eras, with band members and songwriting approaches later resurfacing on landmark 80s metal records.

The article opens its list with Uriah Heep's 1972 album Demons And Wizards, noting it was critically panned on release but is now considered a classic, praised for the interplay between vocalist David Byron and guitarist Mick Box. It draws a direct line to 80s metal by noting that Uriah Heep drummer Lee Kerslake went on to play on Ozzy Osbourne's 1981 album Blizzard Of Ozz. The full piece lists ten such albums in total, though only the first entry was provided in the extracted text.