Search results
Nov 2, 2023 · In Berezniki, Russia, a giant sinkhole first appeared in 1986, apparently after a potash mine flooded. The sinkhole now measures 656 feet (200 meters) deep, 262 feet (80 meters) long and 131 feet (40 meters) wide — and growing. The sinkhole threatens the region's massive potash industry. Potash is an important ingredient in many fertilizers.
Most sinkholes occur in places where water can dissolve the rock below the surface, for example where the bedrock is limestone, salt, or gypsum. They can collapse very quickly, or slump slowly over time. Many sinkholes occur naturally, but human activities can also cause them. Over-pumping of groundwater, mining, and leaking pipes beneath roads ...
Jun 28, 2024 · sinkhole, topographic depression formed when underlying limestone bedrock is dissolved by groundwater. It is considered the most-fundamental structure of karst topography. Sinkholes vary greatly in area and depth and may be very large. There are two main varieties, one caused by the collapse of the roof of a cavern, the other by the gradual ...
Apr 8, 2024 · A massive sinkhole opened up in the middle of the business district in Fukuoka, southern Japan in 2016. Sadayuki Goto/Kyodo News via AP. When the soil ‘ceiling’ collapses, you end up with a ...
Jun 26, 2017 · The Bayou Corne Sinkhole formed on Aug. 3, 2012. (Image credit: On Wings of Care) Warning signs of sinkholes. Areas with underlying dissolvable rock are most susceptible to sinkholes.
A sinkhole is a depression in the ground that has no natural external surface drainage. Basically, this means that when it rains, all of the water stays inside the sinkhole and typically drains into the subsurface. Sinkholes are most common in what geologists call, “karst terrain.”. These are regions where the types of rock below the land ...
Dec 14, 2020 · These areas’ sinkhole problems have dubbed this area “Sinkhole Alley.” The state’s sinkhole research is largely handled by the Florida Geological Survey. In 2013, the group was contracted by the Florida Division of Emergency Management to make a map of areas most susceptible to sinkhole formation based on natural geology.
