Chalk is a type of sedimentary rock, composed predominantly of calcium carbonate. Chalk may also refer to: The Chalk Group, a stratigraphic unit in northwest Europe. The Chalk country, a region of Discworld Blackboard chalk and sidewalk chalk, a material used for writing and art, usually composed of calcium sulfate or calcium carbonate. Chalk (drying agent), magnesium carbonate, used for hands in rock climbing, gymnastics, and weight lifting Chalk, Kent, a village in England Chalk (TV series), a BBC sitcom written by Steven Moffat Chalk (film), a 2006 film by Mike Akel Chalk (military), a group of paratroopers or other soldiers that deploy from a single aircraft Billiard chalk, a silica and corundum compound applied to the tip of a cue French chalk, or talc, magnesium silicate, usually as a powder or in sticks Surname Alex Chalk, English Conservative Party politician, Member of Parliament (MP) for Cheltenham since May 2015 Alfred Chalk (1874–1954), British footballer Dave Chalk (baseball) (b. 1950), former American Major League baseball player Dave Chalk (broadcaster), Canadian journalist and broadcaster Garry Chalk (b. 1952), British-born Canadian actor Gary Chalk (b. 1952), English illustrator and model-maker Gerry Chalk (1910–1943), English cricketer Gordon Chalk (1913–1991), Australian politician Marshall Chalk (b. 1981), Australian rugby league player O. Roy Chalk (1907–1995), American entrepreneur Robin Chalk (b. 1981), English actor Roger Chalk, Australian politician See also Chal (name) Chalke (disambiguation) Chalk's International Airlines