<!–raw–> <!–/raw–> I made a larger stitched image that you can browse around in and see more of these formations. The rock face is on the east side of Highway 3 near the intersection of Hwy 3B. If the controls are not visible: with the mouse over the picture use the Shift and Ctrl keys to zoom in or out. Click and drag with you mouse to move around. As you can see in the larger image the top side of a hole typically becomes an overhanging shelf. Much of the snow cavities surrounding the exposed rock appears to have formed this way. The snow appears to get heavy and soft and then a slit forms at a point where the snow pack shears due to the forces at play. Once that slit forms it enlarges and deepens. With day/night cycles and subsequent snow falls the weight goes up and down and new layers get added above the exposed snow.
Trying out the Version2 Zoomify. Click here to view it in a re-sizeable page