GEORGE HOLTON / SCIENCE PHOTO LIBRARY GEORGE HOLTON / SCIENCE PHOTO LIBRARY
Ice arches in a large iceberg. Ice arches are analagous to arches formed in rocks, in that they are formed by erosion processes. Waves may be concentrated at certain points on the face of a large iceberg, and exploit any faults by eroding (melting) around them. In time, the waves may melt through the iceberg completely, forming an arch if the iceberg is tall enough. Dynamic and internal stresses may then crack the iceberg further until it breaks up. Large cracks may be seen in the iceberg at the centre of the frame. Photographed off the coast of Antarctica.
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