Monument Rocks National Natural Landmark
In the middle of nowhere Western Kansas off of US Highway 83, south of Oakley, is the large fossil rich chalk formations known as Monument Rocks or Chalk Pyramids. These rocks can be up to 70 feet tall and they include arches, windows, & buttes and they are old! I’m talking Cretaceous period so about 88 million years ago. They are the erosion of sea bed which is why so many marine animal fossils are found throughout the area.
Monument Rocks may be out of the way of everything but if you’re ever passing through the area, one of the 8 Wonders of Kansas is absolutely worth a visit.