How did glaciation shape the coastline of Kodiak Island?

During the Pleistocene Epoch, the majority of Kodiak Island was subjected to glaciation. This extensive glacial activity played a primary role in sculpting the island's landscape, resulting in a highly irregular and rugged coastline.1

The process of glacial erosion carved deep valleys and inlets into the island's periphery, contributing to the formation of numerous indented harbours that characterize the modern coast. While the southwestern portion of the island escaped this glacial influence, the remaining areas were significantly altered by the movement of ice, which shaped the island's overall physiography.21