A sinkhole has reportedly swallowed a pond. Mark Korb, a resident of Newscastle, Calif., woke up Sunday morning to find that his man-made pond had been swallowed by a sinkhole.

"This looks like the moon," Korb said as he pointed to the sinkhole, according to KCRA/NBC.

The man-made pond was apparently sucked up by the sinkhole in a matter of hours. Korb said when he drained the pump manually with a pump a few years ago, it took him seven days to complete. He noted that the sinkhole drained the pond much faster. "I would guess probably four to five hours for this whole area to drain," he said.

It is not known what caused the sinkhole but it is not believed to be caused by groundwater dissolving material.

"There was such a lot of mining activity going on in this area in the past, that we never know when there was a man-made cavity underground," said Sierra College Professor of Geology Alex Amigo. The sinkhole could have been caused by a pre-existing fracture or a fracture that formed.

Earlier this month, a man in Florida was sucked to his death after he fell into a sinkhole.
The sinkhole opened up abruptly under his suburban Tampa home. Five other individuals, including a 2-year-old child, were able to escape the home. Rescuers had to pull the victim's brother off the edge of the sinkhole as it ate away at the ground underneath the home.
The 36-year-old man was presumed dead and the search had been called off.

According to the Florida Department of Environmental Protection, sinkholes are considered common in Florida, as the state lies on bedrock composed of limestone or other carbonate rock that can deteriorate by acidic groundwater, forming voids that collapse when the rock can no longer hold the weight of what's above it.

KPLC 7 News, Lake Charles, Louisiana