Sinkhole urban areas due to water main breaks or sewer collapses when old pipes give way. They can also occur from the overpumping and extraction of groundwater and subsurface fluids. Sinkholes can also form when natural water-drainage patterns are changed and new water-diversion systems are developed. Some sinkholes form when the land surface is changed, such as when industrial and runoff-storage ponds are created; the substantial weight of the new material can trigger a collapse of the roof of an existing void or cavity in the subsurface, resulting in development of a sinkhole. Sinkholes tend to occur in karst landscapes. Karst
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