Sinkhole may exhibit a visible opening into a cave below. In the case of exceptionally large sinkholes, such as the Minyé sinkhole in Papua New Guinea or Cedar Sink at Mammoth Cave National Park in Kentucky, an underground stream or river may be visible across its bottom flowing from one side to the other. Sinkholes are common where the rock below the land surface is limestone or other carbonate rock, salt beds, or in other soluble rocks, such as gypsum, that can be dissolved naturally by circulating ground water. Sinkholes also occur in sandstone and quartzite terrains. As the rock dissolves,
A Void its author an opportunity to display his customary virtuosity as an avant-gardist magician, acrobat and clown." Both of Georges Perec's parents perished in World War II, his father as a soldier and his mother in the Holocaust. He was brought up by his aunt and uncle after surviving the war. Warren Motte interprets the absence of the letter E in the book as a metaphor for Perec's own sense of loss and incompleteness: In French, the phrase "sans e" ("without e") sounds very much like "sans eux" ("without them"), another encrypted reference to loss. A Void A Void, translated from