Chalk produce, and thus widely used in the developing world, calcium-based chalk can be made where the crumbling particles are larger and thus produce less dust, and is marketed as "dustless chalk". Colored chalks, pastel chalks, and sidewalk chalk (shaped into larger sticks and often colored), used to draw on sidewalks, streets, and driveways, are primarily made of gypsum. Chalk is a source of quicklime by thermal decomposition, or slaked lime following quenching of quicklime with water. In southeast England, deneholes are a notable example of ancient chalk pits. Such bell pits may also mark the sites of ancient flint mines,
Gordon Chalk Mansfield swore in Chalk as Premier on 1 August, pending the Country Party electing a new leader. They chose Joh Bjelke-Petersen, who succeeded Chalk after a week in office. Chalk continued as Treasurer and Leader of the Liberal Party until his resignation from parliament in 1976. In the Queen's Birthday Honours of June 1971, he was made a Knight Commander of the Order of the British Empire (KBE). Upon his death in 1991 Chalk was accorded a State funeral which was held at Albert Street Uniting Church and he was later cremated. Gordon Chalk Sir Gordon William Wesley Chalk, (16