In 1985, the band Green River released their debut EP "Come on Down", which is cited by many as being the very first grunge record. Another seminal release in the development of grunge was the "Deep Six" compilation, released by C/Z Records in 1986. The record featured multiple tracks by six bands: Green River, Soundgarden, Melvins, Malfunkshun, Skin Yard, and The U-Men. For many of them it was their first appearance on record. The artists had "a mostly heavy, aggressive sound that melded the slower tempos of heavy metal with the intensity of hardcore". The recording process was low-budget; each band was given four hours of studio time. As Jack Endino recalled, "People just said, 'Well, what kind of music is this? This isn't metal, it's not punk, What is it?' ... People went 'Eureka! These bands all have something in common.'" Later that year Bruce Pavitt released the "Sub Pop 100" compilation and Green River's "Dry As a Bone" EP as part of his new label, Sub Pop. An early Sub Pop catalog described the Green River EP as "ultra-loose GRUNGE that destroyed the morals of a generation". Sub Pop's Bruce Pavitt and Jonathan Poneman, inspired by other regional music scenes in music history, worked to ensure that their label projected a "Seattle sound", reinforced by a similar style of production and album packaging. While music writer Michael Azerrad acknowledged that early grunge bands like Mudhoney, Soundgarden, and Tad had disparate sounds, he noted "to the objective observer, there were some distinct similarities."