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- Blue_Hole_(Castalia) abstract "The Blue Hole is a fresh water pond located in Castalia, Erie County, Ohio, in the United States. From the 1920s to 1990 the Blue Hole was a tourist site, attracting 165,000 visitors annually at the height of its popularity, partly because of its location on State Route 269, about 7 miles (11 km) southwest of the Cedar Point amusement park in Sandusky, Ohio.The Blue Hole captured the public’s interest because of its size, about 75 feet (23 m) in diameter, clarity, vibrant blue hue, and enigmatic "bottomless" appearance. Contrary to popular belief, the depth of the Blue Hole is unknown. Water temperature is about 48 °F (9 °C) throughout the year. Floods and droughts have no effect on temperature or water level. The Blue Hole is fed by a passing underground stream which discharges 7 million US gallons (26,000 m3) of water daily into Sandusky Bay to the north, feeding into Lake Erie. The water contains lime, soda, magnesia and iron, and because the Blue Hole is anoxic, it cannot naturally sustain fish. The surrounding terrain is developed on limestone bedrock and exhibits karst topography due to dissolution of the limestone by ground water, creating water-filled sinkholes. The Blue Hole was known to American Indians and was first recorded in history in 1761. Several similar blue holes are known to local residents. The Blue Hole that once was a tourist attraction is now off limits to the public. It is located on the grounds of Castalia Trout Club. It is to be distinguished from another hole similar in size and eerie bluish-green color. This latter hole is owned by the Castalia State Fish Hatchery operated by the Ohio Department of Natural Resources, Division of Wildlife and is open for public viewing.".
- Blue_Hole_(Castalia) wikiPageExternalLink august-19-2014-2.
- Blue_Hole_(Castalia) wikiPageExternalLink default.aspx?v=2&FORM=LMLTCC&cp=qx0mx782z731&style=b&lvl=2&tilt=-90&dir=0&alt=-1000&scene=17364292&phx=0&phy=0&phscl=1&encType=1.
- Blue_Hole_(Castalia) wikiPageExternalLink default.aspx?v=2&FORM=LMLTCC&cp=qx0wyn82zg66&style=b&lvl=2&tilt=-90&dir=0&alt=-1000&scene=17364228&phx=0&phy=0&phscl=1&encType=1.
- Blue_Hole_(Castalia) wikiPageExternalLink search.cfm?searchfield=LCSubject&searchterm=Blue%20Hole%20(Castalia%2C%20Ohio).
- Blue_Hole_(Castalia) wikiPageExternalLink Content?oid=1472191.
- Blue_Hole_(Castalia) wikiPageExternalLink buck07.htm.
- Blue_Hole_(Castalia) wikiPageExternalLink 983.
- Blue_Hole_(Castalia) wikiPageID "13918081".
- Blue_Hole_(Castalia) wikiPageLength "3624".
- Blue_Hole_(Castalia) wikiPageOutDegree "33".
- Blue_Hole_(Castalia) wikiPageRevisionID "683607239".
- Blue_Hole_(Castalia) wikiPageWikiLink Bedrock.
- Blue_Hole_(Castalia) wikiPageWikiLink Castalia,_Ohio.
- Blue_Hole_(Castalia) wikiPageWikiLink Category:Bodies_of_water_of_Ohio.
- Blue_Hole_(Castalia) wikiPageWikiLink Category:Landforms_of_Erie_County,_Ohio.
- Blue_Hole_(Castalia) wikiPageWikiLink Category:Landmarks_in_Ohio.
- Blue_Hole_(Castalia) wikiPageWikiLink Category:Ponds_of_the_United_States.
- Blue_Hole_(Castalia) wikiPageWikiLink Category:Sinkholes_of_the_United_States.
- Blue_Hole_(Castalia) wikiPageWikiLink Cedar_Point.
- Blue_Hole_(Castalia) wikiPageWikiLink Cleveland_Scene.
- Blue_Hole_(Castalia) wikiPageWikiLink Drought.
- Blue_Hole_(Castalia) wikiPageWikiLink Droughts.
- Blue_Hole_(Castalia) wikiPageWikiLink Erie_County,_Ohio.
- Blue_Hole_(Castalia) wikiPageWikiLink Flood.
- Blue_Hole_(Castalia) wikiPageWikiLink Floods.
- Blue_Hole_(Castalia) wikiPageWikiLink Ground_water.
- Blue_Hole_(Castalia) wikiPageWikiLink Groundwater.
- Blue_Hole_(Castalia) wikiPageWikiLink Hypoxia_(environmental).
- Blue_Hole_(Castalia) wikiPageWikiLink Iron.
- Blue_Hole_(Castalia) wikiPageWikiLink Karst.
- Blue_Hole_(Castalia) wikiPageWikiLink Karst_topography.
- Blue_Hole_(Castalia) wikiPageWikiLink Lake_Erie.
- Blue_Hole_(Castalia) wikiPageWikiLink Lime_(material).
- Blue_Hole_(Castalia) wikiPageWikiLink Lime_(mineral).
- Blue_Hole_(Castalia) wikiPageWikiLink Limestone.
- Blue_Hole_(Castalia) wikiPageWikiLink Magnesium_oxide.
- Blue_Hole_(Castalia) wikiPageWikiLink Native_Americans_in_the_United_States.
- Blue_Hole_(Castalia) wikiPageWikiLink Ohio.
- Blue_Hole_(Castalia) wikiPageWikiLink Ohio_Department_of_Natural_Resources.
- Blue_Hole_(Castalia) wikiPageWikiLink Ohio_State_Route_269.
- Blue_Hole_(Castalia) wikiPageWikiLink Pond.
- Blue_Hole_(Castalia) wikiPageWikiLink Sandusky,_Ohio.
- Blue_Hole_(Castalia) wikiPageWikiLink Sandusky_Bay.
- Blue_Hole_(Castalia) wikiPageWikiLink Sinkhole.
- Blue_Hole_(Castalia) wikiPageWikiLink Sinkholes.
- Blue_Hole_(Castalia) wikiPageWikiLink Sodium_carbonate.
- Blue_Hole_(Castalia) wikiPageWikiLink Stream.
- Blue_Hole_(Castalia) wikiPageWikiLink Terrain.
- Blue_Hole_(Castalia) wikiPageWikiLink Tourist_attraction.
- Blue_Hole_(Castalia) wikiPageWikiLink WJW_(TV).
- Blue_Hole_(Castalia) wikiPageWikiLinkText "Blue Hole (Castalia)".
- Blue_Hole_(Castalia) wikiPageWikiLinkText "Blue Hole".
- Blue_Hole_(Castalia) hasPhotoCollection Blue_Hole_(Castalia).
- Blue_Hole_(Castalia) wikiPageUsesTemplate Template:Convert.
- Blue_Hole_(Castalia) wikiPageUsesTemplate Template:Coord.
- Blue_Hole_(Castalia) wikiPageUsesTemplate Template:Reflist.
- Blue_Hole_(Castalia) wikiPageUsesTemplate Template:Vague.
- Blue_Hole_(Castalia) subject Category:Bodies_of_water_of_Ohio.
- Blue_Hole_(Castalia) subject Category:Landforms_of_Erie_County,_Ohio.
- Blue_Hole_(Castalia) subject Category:Landmarks_in_Ohio.
- Blue_Hole_(Castalia) subject Category:Ponds_of_the_United_States.
- Blue_Hole_(Castalia) subject Category:Sinkholes_of_the_United_States.
- Blue_Hole_(Castalia) hypernym Pond.
- Blue_Hole_(Castalia) point "41.405944444444444 -82.80686111111112".
- Blue_Hole_(Castalia) type Lake.
- Blue_Hole_(Castalia) type SpatialThing.
- Blue_Hole_(Castalia) comment "The Blue Hole is a fresh water pond located in Castalia, Erie County, Ohio, in the United States.".
- Blue_Hole_(Castalia) label "Blue Hole (Castalia)".
- Blue_Hole_(Castalia) sameAs m.03cn5r9.
- Blue_Hole_(Castalia) sameAs 5147732.
- Blue_Hole_(Castalia) sameAs Q4929245.
- Blue_Hole_(Castalia) sameAs Q4929245.
- Blue_Hole_(Castalia) lat "41.405944444444444".
- Blue_Hole_(Castalia) long "-82.80686111111112".
- Blue_Hole_(Castalia) wasDerivedFrom Blue_Hole_(Castalia)?oldid=683607239.
- Blue_Hole_(Castalia) isPrimaryTopicOf Blue_Hole_(Castalia).