Map functions can be and often are defined in terms of a fold such as foldr, which means one can do a map-fold fusion: foldr f z. map g is equivalent to foldr (f. g) z.
The Medusa Field is a deepwater development located in Mississippi Canyon Blocks 538 and 582, 100 miles (161 kilometers) south of New Orleans, La. The field is located in 2,200 feet of water (671 meters) and can produce up to 40,000 bopd. Murphy Oil Corp operates the field, holding a 60% working interest.
Bogalusa is a community about 60 mi (100 km) northeast of New Orleans. This is a small town  maybe the population is about 20,000  and the study was started in the early 1970s, primarily by Dr. Gerald Berenson.