Thousands of strange round holes scooped out of the ocean floor have been uncovered along the coast of California.
Some measure nearly 600 feet across, but scientists are unsure how they formed.
As many as 15,000 holes have been found during an underwater survey by the Monterey Bay Aquarium Research Institute (MBARI).
Experts were originally studying mysterious large “pockmarks” across the seafloor off the coast of California’s Big Sur region.
These strange depressions are unexplained and average 574 across and 16 feet deep.
But the MBARI’s underwater vehicles also found more than 15,000 smaller holes, measuring 36 feet across and three feet deep.
Around one-third of the holes contain human waste, including “filled trash bags, 5-gallon buckets and a storage trunk.”
And a fifth of the holes contain “exotic material,” including cobbles, kelp holdfasts and even a whale skull.
Experts believe that many of the objects were “dropped over the side of the boat.”
It’s still not clear what’s causing the holes to form in the first place.
The large pockmarks are described as having been “inactive” for more than 50,000 years.
But many of the smaller holes appear to be much newer and may have formed in recent years.
And one early theory that gases under the seafloor were bubbling up to create the holes was discarded.
“No evidence or fluid or gas venting…were found in either type of feature,” the researchers explained.
Best of all theories so far is the idea that humans might be inadvertently creating the holes with their waste.
When something drops onto the sit floor and sits there, marine life may be moving in and turning it into a home.
This could push sediment up off the seafloor and out away from the area.
And it’s this phenomenon that could be digging out holes in the seafloor – potentially over very long periods of time, for the bigger holes.
However, that doesn’t account for every single hole – and would only explain around a third of the strange formations.
“These observations imply that marine trash is at least partly responsible for approximately 4,500 of the 15,000 [holes] and provide some clues as to how the [holes] are created,” the experts noted in a study presented at the 2019 Fall Meeting of the American Geophysical Union.
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December 12, 2019 at 03:28AM
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Thousands of holes found on seafloor off California coast - New York Post
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