Editing Geography of Missouri (section)

=== Northern Plains ===
{{unreferenced section|date=March 2025}}
The Dissected [[Till]] Plains portion of the northern plains region lies in the portion of the state north of the [[Missouri River]], while the Osage plains portion extends into the southwestern portion of the state bordering the [[Ozark Plateau]]. Thus the northern plains covers an area slightly more than a third of the state. This region is a beautiful, rolling country, with a great abundance of streams.

It is more hilly and broken in its western half than in its eastern half. The elevation in the extreme northwestern Missouri is about {{convert|1200|ft|m|abbr=on}}. and in the extreme northeastern portion about {{convert|500|ft|m|abbr=on}}., while the rim of the region to the southeast, along the border of the Ozark region, has an elevation of about {{convert|900|ft|m|abbr=on}}. The valleys for the larger streams are about 250 to {{convert|300|ft|m|abbr=on}} deep and sometimes 8 to {{convert|20|mi|km}} wide with the country bordering them being the most broken of the region.

The smaller streams have so eroded the whole face of the country that little of the original surface plain is to be seen. The [[Mississippi River]] runs along the length of Missouri's eastern side and is skirted throughout by topographic relief of 400 to {{convert|600|ft|m|abbr=on}}. elevation.