By the mid-1990s, modern rock had become popular.
Psychedelic rock became the genre most closely intertwined with the youth culture.
However, rock has become very different and it is hard to say what its common musical instruments are.
Once the rocks have become extremely hot, the hole is lined with traditional vegetation, such as banana leaves.
He said: 'The trouble is that when it all started 100 years ago no-one envisaged just how popular rock climbing would become.
Our finest rock climbers have become obsessed by performance, by standards and numbers.
But each week, the rocks had become easier to lift, the ax easier to swing.
The show, which was sold out, was another reminder of exactly how popular folk-based rock has become over the last five years.
During the mid-1990s, alternative rock was becoming the popular sound of the decade, as the Top 40 format was starting to die down.
Among the younger crowds heavy metal and rock has become very popular.