Watching the icebergs go by was my favorite shipboard pasttime. Sometimes pieces break off from the edge of the Antarctic ice sheet and fall into the ocean. That's how icebergs are born.
Icebergs can have many different shapes. This type is called a tabular
iceberg.
They really do look just like tables. This one is relatively small--I have read that the surface area of a tabular iceberg can be hundreds of square miles!--Vicki Johns
Source: Moss, Sanford A. Natural History of the Antarctic Peninsula. New York: Columbia University Press, 1988.
Photo by Vicki Johns, University of Tennessee, Knoxville