The Creswellian is a British Upper Palaeolithic culture named after the type site of Creswell Crags in Derbyshire by Dorothy Garrod in 1926. It is also known as the British Late Magdalenian. According to Andreas Maier: "In current research, the Creswellian and Hamburgian are considered to be independent but closely related entities which are rooted in the Magdalenian." The Creswellian is dated between 13,000 and 11,800 BP and was followed by the most recent ice age, the Younger Dryas, when Britain was at times unoccupied by humans.