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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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Currently displaying Natural Sinkholes

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Total Records: 79 Page: 1 of 4 prev<<<[1234]>>>next
Image for Doline et Gouffre de Poudrey, Etalans, Franche Comté, Franceview gallery
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Natural SinkholesDoline et Gouffre de Poudrey, Etalans, Franche Comté, France

in Natural Sinkholes

Entrez dans le gouffre par la doline pour descendre 70m sous terre, dans la plus grande salle aménagée de France / Enter the caves by the doline to go down 70m underground, in the largest room fitted out of France

posted by: Groundspeak Premium Member Gatinaise

location: Bourgogne-Franche-Comté, France

date approved: 9/13/2019

last visited: never

Image for Lapiaz à Loulle-Jura, Franceview gallery
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Natural SinkholesLapiaz à Loulle-Jura, France

in Natural Sinkholes

Belles crevasses naturelles. Beautiful natural sinkholes

posted by: Groundspeak Premium Member gemeloj

location: Bourgogne-Franche-Comté, France

date approved: 8/5/2019

last visited: 8/5/2019

Image for Sinkhole of Buchholz (D)view gallery
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Natural SinkholesSinkhole of Buchholz (D)

in Natural Sinkholes

Sinkhole near Buchholz in Germany.

posted by: Groundspeak Premium Member Axel-F

location: Niedersachsen, Germany

date approved: 6/2/2018

last visited: 8/7/2018

Image for Mardelle auf dem Hölschberg - Erfweiler-Ehlingen, Saarland, Germanyview gallery
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Natural SinkholesMardelle auf dem Hölschberg - Erfweiler-Ehlingen, Saarland, Germany

in Natural Sinkholes

Mardelle auf dem Hölschberg in Erfweiler-Ehlingen / Mardelle on Hölschberg Peak at Erfweiler-Ehlingen

posted by: Groundspeak Premium Member GeoMaulis

location: Saarland, Germany

date approved: 11/6/2017

last visited: 3/16/2017

Image for Aven du lac de Trepadone - Méjannes le Clap - Franceview gallery
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Natural SinkholesAven du lac de Trepadone - Méjannes le Clap - France

in Natural Sinkholes

A proximité du lac de Trépadone, en bordure de la route menant à Méjannes, s'ouvre un aven qui a tout naturellement le nom du point d'eau. Close to Lake Trepadone, on the road to Méjannes, opens an aven which naturally has the name of the water point

posted by: Groundspeak Premium Member Alfouine

location: Occitanie, France

date approved: 9/22/2017

last visited: never

Image for L'aven de la chèvre d'André - Méjannes le Clap - Franceview gallery
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Natural SinkholesL'aven de la chèvre d'André - Méjannes le Clap - France

in Natural Sinkholes

Une magnifique doline protégée par une grille et dont l'effondrement à créé un aven caractéristique de cette région. A magnificent sinkhole protected by a gate and whose collapse created an aven characteristic of this region.

posted by: Groundspeak Premium Member Alfouine

location: Occitanie, France

date approved: 9/22/2017

last visited: never

Image for Doline Wollenloch, Oberkochenview gallery
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Natural SinkholesDoline Wollenloch, Oberkochen

in Natural Sinkholes

The 'Wollenloch' is one of the deepest sinkholes of the 'Swabian Jura'.

posted by: Groundspeak Premium Member Biglailo

location: Baden-Württemberg, Germany

date approved: 5/20/2017

last visited: never

Image for The Big Hole - Berlang, NSWview gallery
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Natural SinkholesThe Big Hole - Berlang, NSW

in Natural Sinkholes

A 3.4km return hike to the Big Hole - an extraordinary limestone roofless cave over 100m deep and 50m wide can be viewed from the viewing platform.

posted by: Groundspeak Premium Member Throsbyonchurch

location: New South Wales, Australia

date approved: 3/22/2017

last visited: never

Image for Chestnut Ridge Sinkhole - Hubbard, Ohioview gallery
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Natural SinkholesChestnut Ridge Sinkhole - Hubbard, Ohio

in Natural Sinkholes

Interesting sinkhole that's located in Hubbard, Ohio.

posted by: Groundspeak Premium Member geofound1

location: Ohio

date approved: 3/22/2017

last visited: never

Image for Cave Hill Sinkhole - Jefferson County,  KY, USview gallery
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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: 5/27/2018

Image for Bellerive Sinkhole - Fayette County,  KY, USview gallery
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Natural SinkholesBellerive Sinkhole - Fayette County, KY, US

in Natural Sinkholes

Located on Bellerive Blvd Lexington, Kentucky next to shopping center.

posted by: Groundspeak Premium Member Crazy4horses

location: Kentucky

date approved: 1/1/2017

last visited: 1/1/2017

Image for Mount Horeb Sinkhole - Fayette County,  KY, USview gallery
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Natural SinkholesMount Horeb Sinkhole - Fayette County, KY, US

in Natural Sinkholes

Located on Mount Horeb road.

posted by: Groundspeak Premium Member Crazy4horses

location: Kentucky

date approved: 1/1/2017

last visited: 1/1/2017

Image for Lehigh Acres Sinkholeview gallery
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Natural SinkholesLehigh Acres Sinkhole

in Natural Sinkholes

The largest sinkhole in Lee County Florida.

posted by: Groundspeak Premium Member BoomersOTR

location: Florida

date approved: 11/20/2016

last visited: 11/20/2016

Image for Küblers Loch - Wolfenhausen, Germany, BWview gallery
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Natural SinkholesKüblers Loch - Wolfenhausen, Germany, BW

in Natural Sinkholes

Outside of Wolfenhausen, Germany, Baden-Württemberg exists a doline/sinkhole. It is called 'Küblers Loch'.

posted by: Groundspeak Premium Member Tante.Hossi

location: Baden-Württemberg, Germany

date approved: 9/1/2016

last visited: never

Image for Dolinen am Eselsberg - Ulm, BW, Germanyview gallery
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Natural SinkholesDolinen am Eselsberg - Ulm, BW, Germany

in Natural Sinkholes

There are some sinkholes visible at the so-called upper 'Eselsberg', located near the University of Ulm, Baden-Württemberg, Germany.

posted by: Groundspeak Premium Member [somnambulist]

location: Baden-Württemberg, Germany

date approved: 5/10/2016

last visited: never

Image for doline du gouffre du Pre Noir -Aigonnay,Frview gallery
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Natural Sinkholesdoline du gouffre du Pre Noir -Aigonnay,Fr

in Natural Sinkholes

In the grove in the fields, you will discover the caves. Dans le bosquet au mileu des champs, vous découvrirez le Gouffre.

posted by: Groundspeak Premium Member sara et gege

location: Nouvelle-Aquitaine, France

date approved: 10/23/2015

last visited: 2/1/2019

Image for Les dolines de Limère - Centre, Franceview gallery
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Natural SinkholesLes dolines de Limère - Centre, France

in Natural Sinkholes

[F] Cinq dolines sont visibles dans ce parc au sud d'Orleans. [E] Five sinkholes are visible in this park south of Orleans.

posted by: Groundspeak Premium Member Chickilim

location: Centre-Val-de-Loire, France

date approved: 10/19/2015

last visited: 9/30/2019

Image for Trou de Bone - Maré - Nouvelle Calédonieview gallery
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Natural SinkholesTrou de Bone - Maré - Nouvelle Calédonie

in Natural Sinkholes

En : Bone Hole is located along the RM4 road on the island of Maré in New Caledonia. Fr : Le Trou de Bone se situe le long de la route RM4 sur l'ile de Maré en Nouvelle Calédonie.

posted by: Groundspeak Premium Member DD Drix

location: New Caledonia

date approved: 10/14/2015

last visited: 9/26/2016

Image for Doppeldoline im Schäll - Brislach, BL, Switzerlandview gallery
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Natural SinkholesDoppeldoline im Schäll - Brislach, BL, Switzerland

in Natural Sinkholes

One of the sinkholes that can be seen along the karst trail from Zwingen to Grellingen.

posted by: Groundspeak Premium Member fi67

location: Solothurn, Switzerland

date approved: 7/16/2015

last visited: never

Image for Schällbachponor - Zwingen, BL, Switzerlandview gallery
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Natural SinkholesSchällbachponor - Zwingen, BL, Switzerland

in Natural Sinkholes

One of the sinkholes that can be seen along the karst trail from Zwingen to Grellingen.

posted by: Groundspeak Premium Member fi67

location: Solothurn, Switzerland

date approved: 7/16/2015

last visited: never

Image for Umpherstone Sinkholeview gallery
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Natural SinkholesUmpherstone Sinkhole

in Natural Sinkholes

The Umpherston Sinkhole was formed from a limestone cave, and has been turned into a sunken garden.

posted by: Groundspeak Premium Member ThePacman

location: South Australia, Australia

date approved: 5/21/2015

last visited: 2/12/2019

Image for Otjikoto Lake, Tsumeb, Namibiaview gallery
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Natural SinkholesOtjikoto Lake, Tsumeb, Namibia

in Natural Sinkholes

Otjikoto Lake is the smaller of only two permanent natural lakes in Namibia. It is a sinkhole lake, that was created by a collapsing karst cave.

posted by: Groundspeak Premium Member André de Montbard

location: Namibia

date approved: 4/6/2015

last visited: never

Image for Pipe Creek Sinkholeview gallery
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Natural SinkholesPipe Creek Sinkhole

in Natural Sinkholes

The Pipe Creek Sinkhole located just east of Converse, Indiana.

posted by: Groundspeak Regular Member Team gEco Friendly

location: Indiana

date approved: 11/12/2014

last visited: never

Image for Thaddeus Kosciuszko Park Sinkhole - Dublin, Ohioview gallery
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Natural SinkholesThaddeus Kosciuszko Park Sinkhole - Dublin, Ohio

in Natural Sinkholes

A sinkhole located in one of Dublin, Ohio's many parks.

posted by: Groundspeak Premium Member 4 boys explore

location: Ohio

date approved: 8/12/2014

last visited: 9/29/2015

Image for Cenote Sagrado - Mexicoview gallery
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Natural SinkholesCenote Sagrado - Mexico

in Natural Sinkholes

Cenote Sagrado is located in Mexico.

posted by: Groundspeak Premium Member tatie

location: Yucatán, Mexico

date approved: 2/25/2014

last visited: 2/27/2019

Total Records: 79 Page: 1 of 4 prev<<<[1234]>>>next
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