Linear features determined from Landsat imagery in North Dakota

The report consists of a map (scale 1:500,000) that shows the linear features determined from Landsat imagery in North Dakota. The linear features, sometimes called linear trends or lineaments, are not identified as to type or origin. Most probably represent fractures or fracture zones, which may affect the movement of water or other fluids through the rocks. The linear features are classified as to length--less than 30 miles, 30 to 200 miles, 200 to 500 miles, and more than 500 miles. (USGS)