プログレッシブ・ロック
The progressive rock radio format should not be confused with the progressive rock music genre. While progressive rock music was certainly played on progressive rock stations, a number of other varieties of rock music were also played. Generally everything from early Beatles and early Dylan on forward was fair game. Progressive rock radio was generally the only outlet for fringe rock genres such as space rock, jazz fusion, and quiet, acoustic-based folk rock and country rock (often played on weekend mornings). Progressive stations were also known for having "turntable hits", songs by obscure artists that did not sell much and were not hits by any conventional measure, but which listeners kept calling up and requesting; Sweet Thursday's "Gilbert Street" was a good example on the East Coast.