Turquoise lakes formed by glaciers • Earth.com

Last update: June 25th, 2019 at 5:12 pm

Today’s Image of the Day from NASA Earth Observatory features turquoise lakes on New Zealand’s South Island.

These distinctive lakes are formed by rivers as active glaciers barge their way through rocky valleys.

As the glaciers move, rocks along the valley floors and walls are pulverized into “glacial flour,” or silt and clay that gives off a greenish blue color in the sunlight.

This image was captured by the Operational Land Imager (OLI) on Landsat 8.

By Chrissy Sexton, Earth.com Staff Writer

Image Credit: NASA Earth Observatory

 

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