Public domain
Turtle Mtns., ND
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
This image from NASA Terra spacecraft shows the Turtle Mountains, which straddle the US-Canada border in central North Dakota. Underlain by 55 million year old sandstones and shales of the Cannonball Formation, the upland surface was sculpted by glaciations. Due to the mountain's 150m elevation above the surrounding lowlands, glacial ice tended to stagnate, forming thousands of lakes and sloughs.
NASA Image and Video Library’s own descriptionCredit lineTurtle Mtns., ND. NASA/JPL, 2015-04-24. Public domain. ID: PIA19435.
