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To: DMaA who wrote (367136)	6/2/2010 8:55:30 AM
From: goldworldnet	4 Recommendations Read Replies (1) \| Respond to of 793824

NASA-Funded Robotic Sub Finds Bottom Of World's Deepest Sinkhole ScienceDaily (June 2, 2007) — A robotic vehicle designed for underwater exploration plunged repeatedly into the depths of Mexico's mysterious El Zacatón sinkhole in late May, finding its previously undiscovered bottom 318 meters (1,043 feet) below the surface and generating a sonar map of its inner dimensions. The vehicle employed autonomous navigation and mapping systems developed by Carnegie Mellon University's Robotics Institute. sciencedaily.com Zacatón is one of a group of five interconnected sinkholes, or cenotes, located in the northeastern state of Tamaulipas, Mexico. It is the deepest water-filled sinkhole in the world with a total depth of 335 metres (1,099 ft). en.wikipedia.org Note the depth reported at wiki references this article. The Floating Islands of Zacatón Posted on Tuesday 17 October 2006 Cenotes are karst formations which occur when underground water etches away at limestone bedrock to form enormous subterranean caverns. Eventually the cavern roofs collapse leaving deep circular rock pools. The word cenote is a Spanish rendering of the Mayan word d'zonot which means literally "a hole in the ground". laputanlogic.com * * *