Complex sentence: From the 1960s to 1980s it was the home of the Marine World-Africa USA park, but in 1986 the park moved to Vallejo, California (eventually becoming Six Flags Marine World), and the land occupied by the world headquarters of Oracle Corporation.
Split into simpler sentences: From the 1960s to 1980s it was the home of the Marine World Amusement Park. In 1986 Marine World moved to Vallejo, California and was replaced by the world headquarters of Oracle Corporation.