County: Logan

Date: June 2009

Photographer: John Charlton/KGS

Place Name: Monument Rocks

Short description: Distant view of Monument Rocks from U.S. Highway 83 in Logan County. The Cretaceous-age Niobrara Chalk in western Kansas was deposited in a massive inland sea that ran north to south across west-central North America about 80 million years ago.

Hi-Resolution Version

Credit: This photo may be reproduced for non-commercial and educational purposes. When using this photo in a publication, website, or presentation, please credit Kansas Geological Survey. For information about use for commercial purposes, please contact the KGS editor.