What role does erosion play in the Hawaiian islands? What kind of weathering and erosion is found at Haleakalā and what does that say about Haleakalā? Objective At the end of this lesson, the students will be able to describe the impacts of deposition, weathering, and erosion on landforms. Background The Earth is undergoing continuous change by weathering and erosion. As rocks are weathered (broken down into smaller pieces) and eroded (moved to new locations) the landscape is gradually transformed. The Hawaiian Islands are on a journey as they travel along toward the northwest on the pacific p Duration: 60 Minutes.