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Rock City, Minneapolis

Categories: Geologic Formations, Nature & Parks
Inspirock Rating:
3.9/5 based on 55+ reviews on the web
Rock City is a park located on hillsides overlooking the Solomon River in Ottawa County, Kansas. It is 3.6 miles south of Minneapolis, Kansas and just over 0.5 mile west of Kansas highway K-106 and the Minneapolis City County Airport on Ivy Road. In a patch of prairie about 500 meters (1600 feet) long and 40 meters (130 feet) wide, Rock City contains three clusters of large spherical boulders. These three clusters contain a total of 200 spherical boulders. It has been designated as a National Natural Landmark.The park, owned by a non-profit corporation, has a visitor center and picnic tables. A small admission fee, which is used to maintain this park, is charged.The remarkable size and spherical shape of these rock formation was first noted by Bell. Later, these boulders were either noted or described by Gould, Landes, Shaffer, Ward, and Swineford. Shaffer was the first person to map the distribution of these boulders at Rock City and investigate their petrography in detail.Physical characteristicsThe large spherical boulders in Rock City are giant calcite-cemented concretions, typically called "cannonball concretions" because of their shape. They range in diameter from 3 to 6 meters (10 to 20 feet) with the average diameter being 3.6 meters (12 feet). These concretions lie 2 to 8 meters (6.6 to 26 feet) apart. Similar giant calcite-cemented concretions have also been found in a quartzite quarry within Lincoln County and in exposures of the similar age sandstones in Utah and Wyoming.
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  • After some recommendations from friends, we took an almost 2 hr road trip to check this place out. We were not disappointed! It's $3/adult and .50/kid. We spent approx 2 hours or so, (may go back in t...  read more »
  • Went here after 5. Great to walk around and marvel at these rocks and wonder how they came to be. I liked touching them and of course photography. 
  • Stopped by on our way home from Concordia. Super cute town, clean looking. The road to Rock City is a dirt road, NOT GRAVEL, DIRT!! We live on a gravel road so it wasn't a big deal to us, however, it ...  read more »