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
Tiny (Once Upon a Time) Anton concludes that all humans are liars and resumes his attacks. David offers to surrender himself if Anton will spare everyone else. When Anton leaps towards David, he crashes through the ground into a sinkhole just as the mushroom wears off, leaving him human-sized and clinging to a pipe. David leads the townspeople in rescuing a despondent Anton from the pit, restoring his faith in humans. Anton is welcomed by the townspeople. He reveals the beanstalk stems and is brought to fertile farmland where he could grow beans, making it possible to return to the Enchanted Forest. He warns that