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What are these marks in the ice? 🤔

On March 13, 2023, #Landsat 9 took these images of Tunulliarfik Fjord in Greenland. At the time, the fjord’s waters were capped with a layer of sea ice. 🌊🧊 https://go.nasa.gov/3V4P0m6
#NASAEarth

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