DescriptionPart of the River Tees in beautiful Upper Teesdale. Low Force tumbles over the Whin Sill, a layer of hard dolerite rock (known locally as whinstone). The Whin Sill formed 295 million years ago from molten rock, which cooled and solidified underground. Today, after millions of years of erosion it is exposed as rocky landscape features at Low Force, High Force and other places in Upper Teesdale.
LicenseWhat does this mean? Attribution License
Further informationLink: https://www.flickr.com/photos/41281834@N08/15626628873/
Resource type: Image
Added by: Pat Thomson
Last modified: 6 years, 8 months ago
Viewed: 807 times
Picture Taken: Unknown