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Natural Sinkholes
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Managed By: Icon Here Natural SinkHoles
Description:
This category is for those that love sinkholes
Expanded Description:
Sinkhole Formation Photo Sharing and Video Hosting at Photobucket Photo Sharing and Video Hosting at Photobucket A sinkhole (also called a doline) is a depressed area usually formed by solution of superficial bedrock or collapse of underlying caves. The surface expression of a sinkhole is typically a conical depression or area of internal drainage. Sinkholes range in size from several square yards to hundreds of acres. They may be quite shallow or may extend hundreds of feet deep. Sinkholes are places where there is rapid recharge (replenishing) of groundwater from the surface and, therefore, are areas of potential groundwater contamination. For this reason, managing surface water and waste disposal in sinkhole-prone areas are important to maintaining good groundwater quality. The diagrams below conceptually illustrate the stages of sinkhole formation. Actual conditions in nature may be very different than those illustrated. For instance, the rock and soil layers may be thicker or thinner, the fracture and cave passage may be larger or smaller, and the surfaces are likely to be much more irregular in shape. Stage 1 For a sinkhole to form there must be an opening in the bedrock surface that allows overlying soil to move downward into a cave passage. This stage illustrates a solution-widened fracture in the bedrock choked with soil. Photo Sharing and Video Hosting at Photobucket Stage 2 Soil that collected in the cave passage in Stage 1 has been carried away by flowing water. Photo Sharing and Video Hosting at Photobucket Stage 3 Soil that collected in the fracture or bedrock opening collapses into the cave or is washed into the cave by water movement from the soil into the cave. Photo Sharing and Video Hosting at Photobucket Stage 4 Additional soil movement or collapse causes a void to form at the bedrock surface Photo Sharing and Video Hosting at Photobucket Stage 5 The void enlarges and moves upward in the soil profile, a process known as stoping. Photo Sharing and Video Hosting at Photobucket Stage 6 Eventually the void enlarges until only a thin layer of soil remains at the surface. Photo Sharing and Video Hosting at Photobucket Stage 7 Finally the thinned soil roof can no longer support itself and creates a surface collapse that may or may not choke the hole in the bedrock. Typically the initial appearance is a steep-sided hole at the surface several feet deep with a floor of soil that used to be at the surface. Photo Sharing and Video Hosting at Photobucket Stage 8 If the bedrock throat of the sinkhole remains plugged with the collapsed soil, the surface hole may fill with other eroded soil. Photo Sharing and Video Hosting at Photobucket In some instances the unstable, steep-sided surface hole may widen into a conical depression, like the upper portion of an hour glass. If the throat of the sinkhole remains open, surface water will drain readily. If the throat becomes plugged with soil, water may pond temporarily or permanently in the depression, forming a sinkhole lake. The entire process may repeat itself by starting over.
Instructions for Posting a Natural Sinkholes Waymark:
To create a waymark in this category, you must record the actual location of the Sinkhole.
To be accepted, the waymark must meet the following criteria:
1. You must provide coordinates taken at the location. 2. You must provide one or more quality pictures of the location of the Sinkhole. Neither you nor your GPSr need to be in the picture. In fact, it is preferable that you aren't in it. Mark it as the default image. Additional photographs are requested, but not required.
3. In General the Sinkhole should be at least 5' in diameter (the bigger the better)
4. Narrative Description -- Please include as much information about the location you are waymarking as you can
Instructions for Visiting a Waymark in this Category:
Please provide a photo of you and/or your GPS at the site.
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Total Records: 4 Page: 1 of 1 prev<<<[1]>>>next
Image for Cedar Sink - Mammoth Cave National Park - KYview gallery

here0 km

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Natural SinkholesCedar Sink - Mammoth Cave National Park - KY

in Natural Sinkholes

A looping trail into a large sinkhole. The wildflowers abound in springtime.

posted by: Groundspeak Premium Member ChapterhouseInc

location: Kentucky

date approved: 8/2/2009

last visited: 4/7/2006

Image for Mammoth Dome Sinkhole - Mammoth Cave US National Park, KYview gallery

NENE5.8 km

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Natural SinkholesMammoth Dome Sinkhole - Mammoth Cave US National Park, KY

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Mammoth Dome Sink is a leisurely walk from the Mammoth Cave National Park Visitor's Center.

posted by: Groundspeak Premium Member cldisme

location: Kentucky

date approved: 4/11/2011

last visited: 3/17/2016

Image for I -64 Rest Area Sink Hole - Georgetown, Indianaview gallery

NN126.7 km

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Natural SinkholesI -64 Rest Area Sink Hole - Georgetown, Indiana

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Sinkhole located in a rest area along I-64 westbound near Georgetown, Indiana.

posted by: Groundspeak Charter Member BruceS

location: Indiana

date approved: 11/19/2007

last visited: 6/3/2018

Image for Cave Hill Sinkhole - Jefferson County,  KY, USview gallery

NN127.9 km

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Natural SinkholesCave Hill Sinkhole - Jefferson County, KY, US

in Natural Sinkholes

Located in Cave Hill Cemetery Louisville, Kentucky

posted by: Groundspeak Premium Member Crazy4horses

location: Kentucky

date approved: 1/1/2017

last visited: 6/11/2021

Total Records: 4 Page: 1 of 1 prev<<<[1]>>>next
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