Science Fair Project Encyclopedia
Mariana Islands (sometimes called The Marianas; up to the early 20th century sometimes called the Ladrone Islands) are a group of islands made up by the summits of 15 volcanic mountains in the Pacific Ocean.
They are the southern part of a submerged mountain range that extends 1,565 miles (2,519 km) from Guam to near Japan. The Marianas are the northern most islands of a larger island group called Micronesia. The Marianas have a total land area of 396 square miles (1026 km²). Guam is a United States territory, and the rest of the Mariana Islands are a United States of America commonwealth called Northern Mariana Islands.
Following the Spanish-American War, Spain ceded the southern part of the group to the United States, and sold the northern remainder to Germany. After World War I the former German islands were entrusted by the League of Nations to the control of Japan.
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