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
Close to a World Below a World Below" a near-perfect 9.7 out of 10 praising Ross Dolan's vocals along with the overall brutality of the album. Close to a World Below Close to a World Below is the fourth album by Immolation. It was released on Metal Blade Records in 2000. Since its release, "Close to a World Below" has received universal acclaim. Todd Nief of AllMusic gave the "Close to a World Below" four and a half stars, calling the album a late-career classic. He stated that with "Close to a World Below", Immolation released one of the most profound and creative death metal