Researchers and drilling operators worked around the clock for seven weeks, drilling 100 meters into Lake Junin, high in the Peruvian Andes. Working in two 12-hours shifts, scientists collected the to help them create a record of glacial changes that stretches back nearly 1 million years.

Don T. Robell, right, of Union College and lead author of the recently published paper in Nature, is with one of the project’s Peruvian drillers. Researchers and drilling operators worked around the clock for seven weeks in 2017 on a coring platform to collect sedimentary deposits from Lake Junin, high in the Peruvian Andes to create a record of glacial changes that stretches back nearly 1 million years.

Lake Junin vista