Monument Rocks Natural Area
Monument Rocks Natural Area includes pinnacles, small buttes, and spires of chalk of the Niobrara formation, and erosional remnants of sediments deposited in the ancient Kansas Sea of Cretaceous time. The site is a rich source of fossils of Cretaceous marine animals.
Year designated: 1968
Please remember, National Natural Landmarks (NNLs) are not national parks. NNLs are owned by a variety of public and private entities and allowing visitation is at their discretion. Many NNL sites maintain public websites where additional information may be found.