29.4 MB (2.4 MB compressed)
3937 x 2607 pixels
33.3 x 22.1 cm ⏐ 13.1 x 8.7 in (300dpi)
JAMES STEINBERG / SCIENCE PHOTO LIBRARY JAMES STEINBERG / SCIENCE PHOTO LIBRARY
Odd Dakota sandstone concretions in Rock City, Kansas, are calcium carbonate deposits formed millions of years ago when the area was covered by an inland sea. Erosion has left these free-standing formations, some of which are up to 27 feet in diameter.
Model release not required. Property release not required.