The band's first album soared to US sales alone in excess of four million.
It barely touched the UK chart, but the album is revered by fans as a Genesis landmark.
The Moodies hit their stride with a memorable fourth album in the final year of the 1960s.
The band scaled new peaks with their first album of the 1980s.
It was more than a surprise when, on the chart of 6 April 1974, Genesis made their first-ever showing on the UK singles bestsellers.
The band's 1978 album was their first to feature formal vocals and lyrics, and followed film and live recording projects.
Gong’s energised Acid Motherhood, recorded with Acid Mothers Temple, generated some controversy among hardcore fans when it was released on 30 March 2004.
Released in 1974, almost a year to the day after their debut album, Mirage saw Camel take their unique prog brilliance to a new level.
It was the 1974 record that provided the international awakening of the progressive masters.
Remembering the hugely important progressive rock musician Kevin Ayers, who died in France at the age of 68 on 18 February 2013.
On 15 January 1977, the progressive innovators debuted on the UK chart with their eighth album.
'In Dulci Jubilo' was not just Oldfield's first UK top five single, but has become a part of the sound of Christmas in his home country.
The career-shaping studio releases 'Phaedra' and 'Rubycon' were followed by the band's first live album, 'Ricochet.'
Expectations for 'Selling England By The Pound' were high in the UK, and it didn’t disappoint, with a No. 3 debut.
Before he was 22, Ridley had been a co-founder of two key British bands of the late 1960s, Spooky Tooth and Humble Pie.