""I am thinking, well, America has finally got to us," said one old woman, as she sat on the ground outside her house."
WTF does that mean? We've gotten the reputation of stealing lakes now? Kookie Russian.
Calcium carbonate. Limestone carverns exist all over the place. Wob is right. Sinkholes pop up all over, swallowing entire neighborhoods and streets, so it's not surprising to read that a lake disappeared.
1.) Picture with the ladder
This sinkhole in Logan County, KY is 70 feet deep. It opened in 1997 after heavy rains. The geology here is similar to the site chosen for the Kentucky TriModal Transpark.
Photo by Donnie Davis
2.) Picture with excavator in the hole
The $1 million repair of the Dishman Lane sinkhole collapse in Bowling Green, KY required removal of loose material down to bedrock. Note the disection of the rock above the cave by groundwater. The cave passage is 30 feet wide x 20 feet high, with a river in the bottom
Photo by Guy Briggs, 8/7/02
Sinkholes are natural phenomena in the landscape that covers the majority of the Barren River Area. These sinkholes have a variety of characteristics. The actual openings into subterranean caves may be large or small, and the area that they drain may encompass a few hundred square feet to many acres (Crawford, 1988). The topography of the land surrounding a sinkhole can be gentle and gradual slopes or steep and rugged terrain. Each sinkhole has unique characteristics.
Figure 10-1. Cross-sectional view of sinkholes.
(Source: N. Crawford, Karst Landscape Analysis: Warren County Comprehensive Plan, 1989)
The karst landscape associated with sinkholes is formed on carbonic rock (i.e., limestone and dolomite) as groundwater dissolves and enlarges subterranean openings. Openings start as small, hardly noticeable cracks in the rock. The groundwater seeping through the cracks is mildly acidic, giving it solvent power (Reeder, 1988). As the openings grow in size, they will reach closer to the ground surface. When they reach the surface, they open as sinkholes (Figure 10-1).
Sinkholes collect stormwater runoff and serve as injection points where runoff is transferred into underground aquifers. Like streams and rivers, sinkholes can flood when heavy rainfall occurs. Also, heavy rainfall or general changes in the volume of water drained into a sinkhole, perhaps resulting from urban land development in the area, can contribute to sinkholes collapsing. Sinkhole flooding and collapse can cause significant, localized property damage. Property owners, developers, and planners should be educated about and prepared to address the threats associated with sinkholes.
A team from Texaco was drilling for oil in a lake, and accidentally drilled into a salt mine 1600 feet under the surface of the lake....
the lake began draining into the salt mine. (Miraculously all the miners escaped unharmed!)
As it drained, the hole got bigger and bigger and bigger.... Sucked entire barges under and everything. eventually the whole lake was drained and the river that ran from the lake to the Gulf of Mexico reversed flow and refilled the lake with brackish water.