A group surveying underwater energy pipelines in Michigan believes it has inadvertently discovered signs of ancient Ice Age living.
The team of local indigenous residents had initially set out to examine Enbridge’s Line 5 oil and natural gas pipelines in the straits separating the Lower and Upper Peninsulas during an ongoing dispute over operations, the Detroit Free Press reported.
But when they sent a remote-controlled vehicle into the water for the project, they said they happened stones arranged in circular and linear patterns on the lake floor — an area that hasn’t been above water in about 10,000 years.
“We didn’t expect to find this — it was really just amazing,” said Andrea Pierce, 56, a citizen of the Little Traverse Bay Bands of Odawa Indian.
Pierce was among the four women who led the research into the pipeline toward the end of last month when the discovery was made.
Similar findings have come to light in recent years.