A close-up view of Hubbard Glacier showing its many layers. In the foreground is the waters of Yakutat Bay, with the glacier's newest face of glacial layers revealed. The dark staining on the glacier is rock that is ground to a fine powdery dirt. This is caused by the glacier's slow movement from the background to the foreground, before calving/falling into the Bay. It takes about 400 years for ice to traverse the length of the glacier, meaning the ice seen in front is about 400 years old.