Cannonball, concretion
Silvia Favaro
Università Milano Bicocca, Milano, Italy
In North Dakota, while crossing the marvelously sculpted badland areas, you can bump into a lot of perfectly spherical reddish concretions called 'cannonballs'. The concretions took their name after the Cannon Ball River and census, in North Dakota. They are greater than one meter in diameter and are made of hard, cemented sandstone popping out unconsolidated host clay, due to differential weathering. This photo was taken within the Theodore Roosevelt National Park, North Unit.
Reuse
Creative Commons Attribution 3.0 Unported (CC BY 3.0) (opens in a new window)Credit: Silvia Favaro (distributed via imaggeo.egu.eu)
Properties
Type
Image
Format
JPG
Size
2.2 MB
Width
2000 px
Height
3008 px
Aspect
125:188
Brand
Nikon
Model
D70
Exposure
26 mm f/16 1/1000 s ISO 1000
Taken
August 2017
Coordinates
47.5820, -103.2676
Tint
Yellowish white
Submitted
6 July 2022
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