Sandstone "wall" from which "cannon ball" concretions emanate. Theodore Roosevelt National Park, North Unit, North Dakota August 21, 2013
Canon EOS 60D with Tamron 18-200mm lens f/11.0 at 1/160 sec Aperture Priority 38.0mm ISO 100 Three bracketed exposures (+2.0, 0.0, -2.0 EV) processed from RAW by HDR Darkroom 2 Pro and further processing by Photoshop Elements 11
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