Glenn Cornick (1947-2014) was an English bassist best known for his work with the progressive rock band Jethro Tull. He was a founding member of the band, contributing to their early sound and helping to shape their distinctive blend of rock, folk, and classical music. Cornick played on their debut album, "This Was" (1968), which featured a mix of blues and experimental elements, and he remained with the band until 1970, participating in the recording of their sophomore release, "Stand Up." After leaving Jethro Tull, Cornick formed several bands, including Wild Turkey, which released a number of albums in the 1970s, showcasing his continued influence in rock music. His playing style was characterized by melodic bass lines and a strong sense of rhythm, contributing to the overall texture of the bands he played with. Cornick's impact on music is particularly noted in the progressive rock genre, where he helped pave the way for the incorporation of diverse musical influences within rock. His contributions to Jethro Tull, in particular, remain significant in the development of progressive rock music in the late 1960s and early 1970s.