Sinkhole also form in high and dry places in specific locations. Sinkholes that capture drainage can hold it in large limestone caves. These caves may drain into tributaries of larger rivers. The formation of sinkholes involves natural processes of erosion or gradual removal of slightly soluble bedrock (such as limestone) by percolating water, the collapse of a cave roof, or a lowering of the water table. Sinkholes often form through the process of suffosion. For example, groundwater may dissolve the carbonate cement holding the sandstone particles together and then carry away the lax particles, gradually forming a void. Occasionally a sinkhole
Bayou Corne sinkhole Oxy3 had begun to cave in. Louisiana Governor Bobby Jindal issued an evacuation order on August 3, 2012 after residents reported smells of crude oil throughout the town. Texas Brine investigated the situation by drilling a relief well and found that the outer wall of the salt dome had collapsed, allowing sediment to pour into the cavern and oil and gas to escape to the surface, causing the shaking and bubbles residents had observed. When first the sinkhole appeared, it spanned a hectare (2.5 acres). As of late February 2014, the sinkhole is 26 acres and growing. Texas Brine is