Anadarko Petroleum Corporation. The Group's principal activities are the exploration, development, production and marketing of oil and gas. It operates in three segments: oil and gas operation, marketing and minerals. Oil and Gas segment finds and produces natural gas, crude oil, condensate and natural gas liquids. The Marketing segment is responsible for selling natural gas production as well as purchased volumes of third-party gas and oil. The Minerals segment finds and produces minerals in several coal, industrial minerals and trona (natural soda ash) mines. The Group's major areas of operations are located in the United States, primarily in Texas, Louisiana, the mid-continent and Rocky Mountain regions, Alaska, Gulf of Mexico, Canada, Algeria, Guatemala, Venezuela and other international areas. On 06-Dec-2002, the Group acquired Howell Corporation. Oil and Gas exploration and production accounted for 95% of 2002 revenues; Marketing and Trading, 4%, Minerals, 1% and Other, nominal.