Watford City in McKenzie County, North Dakota — The American Midwest (Upper Plains)
“Cannon Ball” Concretions
The large spherical boulders in front of you are called concretions. They may have any shape, but most are round. Concretions are formed within rocks (shale, clay, sandstone, etc.) by the deposition of mineral around a core. More concretions will be exposed here as erosion continues.
Erected by National Park Service.
Location. 47° 35.783′ N, 103° 19.933′ W. Marker is in Watford City, North Dakota, in McKenzie County. Marker is on Scenic Drive, on the right when traveling north. Touch for map. Marker is located at the Slump Block Pullout in the North Unit of Theodore Roosevelt National Park. Marker is in this post office area: Watford City ND 58854, United States of America.
Other nearby markers. At least 8 other markers are within 4 miles of this marker, measured as the crow flies. Long X Cattle Trail (approx. 0.8 miles away); North Dakota Badlands (approx. one mile away); Slump Formation (approx. 1.4 miles away); Longhorns (approx. 2 miles away); Building From Hard Times (approx. 2.3 miles away); Bentonitic Clay (approx. 2.9 miles away); Man and Grass (approx. 3.6 miles away); Walter H. Chaloner (approx. 3.6 miles away). Touch for a list and map of all markers in Watford City.
Categories. • Natural Features •
Credits. This page was last revised on June 16, 2016. This page originally submitted on September 14, 2015, by Bill Coughlin of North Arlington, New Jersey. This page has been viewed 204 times since then and 39 times this year. Photos: 1, 2, 3, 4. submitted on September 14, 2015, by Bill Coughlin of North Arlington, New Jersey.