<P> "Rock Chalk, Jayhawk" (a.k.a. the "Rock Chalk" chant) is a chant used at University of Kansas Jayhawks sporting events . The chant is made up of the phrase "Rock chalk, Jayhawk, KU". </P> <P> The chant was first adopted by the university's science club in 1886 . Chemistry professor E.H.S. Bailey and his colleagues were returning by train to Lawrence after a conference . During their travel, they discussed a need of a rousing yell . They came up with "Rah, Rah, Jayhawk, Go KU", repeated three times, which later became "Rock Chalk Jayhawk, KU". </P> <P> By 1889, "Rock Chalk"--a transposition of chalk rock, a type of limestone, that exists in the Cretaceous - age bedrocks of central and western parts of the state as well as on Mount Oread, where the University is located, which is similar to the coccolith - bearing chalk of the white cliffs of Dover--later replaced the two "rahs ." Those responsible for the change are unknown, with Bailey himself crediting the geology department, and others an English professor . </P>

What is the origin of rock chalk jayhawk
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