The Mariana Arc is a volcanic island arc located in the western Pacific Ocean, part of the larger Mariana Islands. It is formed by the subduction of the Pacific Plate beneath the Mariana Plate, leading to volcanic activity and the creation of several islands, including Guam and Saipan. The arc is known for its deep ocean trenches, particularly the Mariana Trench, which is the deepest part of the world's oceans. The region is characterized by its unique geological features and biodiversity. The Mariana Arc is home to various marine species and ecosystems, making it an important area for scientific research. Additionally, the volcanic activity in the arc contributes to the formation of new land and influences the surrounding oceanic environment.