Originally, jumbles were twisted into various pretzel-like shapes and boiled. The letters were meaningless jumbles, which made them easy to detect as forgeries. In arid areas or under high cliffs, they are generally exposed jumbles of fallen rock. In Australia, Arnotts manufactures a related product called "Honey Jumbles". It also created the rockfalls at Chaos Jumbles. The resulting wilderness of debris, the Chaos Jumbles, covers an area of . The company operates four information centres at Rivington, Jumbles Country Park, Roddlesworth and Haslingden Grane. The brook, a tributary of the River Croal, flows through the reserve from Jumbles Reservoir. In 1971 the Jumbles Reservoir in the Bradshaw Valley was opened. Algorithms have been designed to solve Jumbles, using a dictionary. Jumbles of logs could block drainage, flooding riverside farms and homes. Jumbles Country Park is a country park in Bolton, Greater Manchester. The "songs" are mostly 10-minute jumbles of various demos, rehearsal, live, and unreleased recordings. The Jumbles Reservoir is a heavily modified, high alkalinity, shallow reservoir in North West England. Jumbles were known by many variations on the basic name, including jambal, jemelloe, and gemmel.