When Joseph Cook first landed on the Greenland ice sheet in 2010, he was expecting to see a pristine white environment. What he found was a "colorful patchwork" -- from blacks and grays to greens, purples and browns, with neon blue melt streams cutting through the ice.
source https://www.cnn.com/2020/12/14/world/microscopic-life-melting-greenland-ice-sheet-c2e-spc-intl/index.html