Upper Black Rapids - Trinity Basin
This is panorama looks south over the Black Rapids Glacier in the eastern Alaska Range. The basin center-left is the Trinity Basin, the main accumulation area for the glacier. Center right you can see the pothole field, leftover cauldrons that formed as crevasses healed after the glacier surged in 1936-1937. The depression center-right is Aurora Lake, a large lake on the margin of the glacier that drains as an outburst flood, usually in June.
