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 A Marriage Below Zero A Marriage Below Zero is a novel by Alan Dale. Published in 1889, it is described as the first English-language novel portraying a romantic relationship between two men. The book is told from the point of view of Elsie Bouverie, a pretty, frivolous English girl who falls in love with handsome, quiet Arthur Ravener. They marry, and Elsie gradually comes to realise that she has competition for Arthur's affection in the form of Captain Dillington, Arthur's male lover. Elsie engages a private detective who provides her with an address in Notting Hill; she goes there to