The Kola Superdeep Borehole
Before they shut down the project, they learned other fascinating things about the Kola Superdeep Borehole. For one, they discovered fossils of marine plants around four miles into the dig. The relics were surprisingly preserved, especially considering the fact that they had been there for a very long time. Just so you know, the rock was believed to be over two billion years old at the time!
The Kola Superdeep Borehole
Not What They Expected
Not only that, but they also made an even more exciting discovery at the depths of the Kola Superdeep Borehole. While they were measuring seismic waves, they learned that they were wrong to assume that the rock underneath was going to turn from granite to basalt at around two to four miles deep. What exactly did they learn about the type of rock that far down into the crust?
Not What They Expected
