Geologic Formations
Cracked Cliffs NPS photo The cliffs along the Niobrara River reveal millions of years of the earth's history. For a description of this geological "layer cake", click to download a PDF of our geology bulletin. You will need Acrobat Reader to open this file. Acrobat is free, and you can download it here. |
Did You Know?
The Niobrara is a crossroads of habitats where many species are on the edge of their range. 83 eastern species reach their western range limits and 47 western species approach their eastern limits here. Click "More" to visit the Niobrara National River "Nature & Science" page. More...