A layered lake is a little like Earth’s early oceans − and lets researchers explore how oxygen built up in our atmosphere billions of years ago
- Written by Elizabeth Swanner, Associate Professor of Geology, Iowa State University
Researchers sample water from various layers to analyze back in the lab.Elizabeth Swanner, CC BY-NDLittle Deming Lake doesn’t get much notice from visitors to Itasca State Park in Minnesota. There’s better boating on nearby Lake Itasca, the headwaters of the Mississippi River. My colleagues and I need to maneuver hundreds of pounds of...











