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
A Rickle in Time being and instructs Morty and Summer to break off their collars, but the resulting chain of uncertainty further splits their realities into dozens of different timelines. After defeating the testicle monster, Rick notes that time is falling apart. Summer's collar transports her back to her time, but one of the Mortys' collar is broken. With the garage falling away piece by piece, the Morty with the broken collar falls into the spaceless void and Rick jumps after him. He gives Morty his collar and instead prepares to face death. But then, Rick spots Morty's collar floating below him, fixes it,