The unusual set of feature was shaped by glaciers more than 20,000 years ago.
NASA Earth Observatory has unveiled a new image of Boston Harbor's drumlin islands, highlighting these rare geological formations—one of only three worldwide—that were carved out by glaciers more than 20,000 years ago.Captured by the Landsat 8 Operational Land Imager on 19 July 2024, the photograph shows an aerial view of the harbor, and the 34 islands and peninsulas that form the National and State park, drawing attention to its historical and cultural importance.
Studying the formation of these islands has given scientists new insights into the role that glaciers have played in shaping many existing land-forms.Jasper Knight, a geoscientist at the University of Witwatersrand, in South Africa, told NASA back in 2016: 'Previous ideas of slow, steady advance, or retreat, really don't hold. Glaciers are dynamic.
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