A closeup look at the fantastic ragged edge of the huge face that forms the headwall above Iceberg Lake. The jagged black layer at the top is from an intrusive sill of diorite that occurs on many peaks in Glacier National Park. The sill, known as the Purcell Sill, is 750 million years old.
This image is from the presentation "Astride the Divide - Rocky Mountains - Iceberg Lake - Glacier National Park".
Go to presentation where this image occurs.
Go to location in presentation where this image occurs.
Go to presentation where this image occurs.
Go to location in presentation where this image occurs.
Copyright 2001-2016 alavigne.net.