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.
Topics. This historical marker is listed in this topic list: Natural Features.
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. Marker is located at the Slump Block Pullout in the North Unit of Theodore Roosevelt National Park. Touch for map. Marker is in this post office area: Watford City ND 58854, United States of America. Touch for directions.
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); The View that Launched a Park Building From Hard Times (approx. 2.3 miles away); Bentonitic Clay (approx. 2.9 miles away); Man and Grass (approx. 3.6 miles away). Touch for a list and map of all markers in Watford City.
Credits. This page was last revised on June 16, 2016. It was originally submitted on September 14, 2015, by Bill Coughlin of Woodland Park, New Jersey. This page has been viewed 278 times since then and 2 times this year. Photos: 1, 2, 3, 4. submitted on September 14, 2015, by Bill Coughlin of Woodland Park, New Jersey.