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 Marriage Below Zero the first English-language gay-themed novel, and establishes the pattern of gay novels ending in death: especially suicide. Its melodramatic format is closely linked to its author's occupation as a New York drama critic at a time when the primary American theatre form was melodrama. The book met with mixed reviews. An anonymous reviewer in "Bedford's Magazine" described it as ""A saturnalia in which the most monstrous forms of human vice exhibit themselves shamelessly""; while an approving review in the "New York World" described it as ""Absolutely unconventional"". A Marriage Below Zero A Marriage Below Zero is a novel by Alan