Abstract: This essay uses topographic map evidence to interpret landform origins along the continental divide between the Red Rock River in Beaverhead County, Montana and Henrys Fork in Clark and Fremont Counties, Idaho. The continental divide segment studied in this essay is located along the Centennial Mountains east end. The Centennial Mountains are a west-to-east […]
Category archives for Iowa
A geomorphic history based on topographic map evidence This essay is an overview of more detailed essays using topographic map evidence to illustrate and interpret landform origins in the Missouri River drainage basin segment between Sioux City, Iowa and Kansas City, Missouri. The detailed essays can be found under IA Missouri River, KS Missouri River, […]
A geomorphic history based on topographic map evidence Abstract: This overview essay provides highlights from more detailed essays describing drainage divide areas for the Iowa and Missouri Platte River drainage basin (which should not be confused with the Nebraska Platte River drainage basin, which is addressed by a separate overview essay and separate more detailed […]
A geomorphic history based on topographic map evidence Abstract: This essay provides an overview of information contained in more detailed essays found under Chariton River on the sidebar category list. The more detailed essays interpret landform origins based on Chariton River drainage basin topographic map evidence. The Chariton River originates in southern Iowa as an […]
A geomorphic history based on topographic map evidence Abstract: This overview essay provides highlights of more detailed essays illustrating and describing Iowa and Missouri Grand River drainage basin topographic map evidence which is then interpreted to determine Iowa and Missouri Grand River drainage basin landform origins (the Iowa and Missouri Grand River should not be […]
A geomorphic history based on topographic evidence Abstract: The Big Sioux River-Rock River drainage divide area is located in southeastern South Dakota, the Minnesota southwest corner, and the Iowa northwest corner. Rock River is a south and south-southwest oriented tributary to the south-oriented Big Sioux River. Topographic map evidence suggests the Rock River valley eroded […]
A geomorphic history based on topographic map evidence Abstract: The Big Sioux River-Floyd River drainage divide area is located in northwest Iowa. Present day Big Sioux-Floyd River drainage divide area landforms include the Big Sioux River and Big Sioux River tributary valleys, Floyd River and Floyd River tributary valleys, and drainage divides between the various […]
Abstract: The Floyd River-Little Sioux River drainage divide area in Woodbury and Monona Counties, Iowa is located in northwest Iowa and the Floyd River and Little Sioux River are south-southwest oriented Missouri River tributaries, with the Floyd River being located north and west of the Little Sioux River. The south-southeast oriented Missouri River is located […]
Abstract: This essay uses topographic map evidence to illustrate and discuss landform origins in the Floyd River-Little Sioux River northern drainage area located in northwest Iowa. A separate essay illustrates and discusses landform origins in the Floyd River-Little Sioux River drainage divide area in Woodbury and Monona Counties. The Floyd River and Little Sioux River […]
Abstract: The Little Sioux River-North Raccoon River drainage divide area in Cherokee, Buena Vista, and Sac Counties, Iowa was eroded during immense south oriented floods from a rapidly melting North American ice sheet. Initially the melt water floods flowed across Cherokee, Buena Vista, and Sac Counties in a southeast direction toward what was then an actively […]
Abstract: This essay uses topographic map evidence to interpret Little Sioux River-Boyer River drainage divide area landform origins. The Little Sioux and Boyer Rivers are located in western Iowa and are southwest and south-southwest oriented Missouri River tributaries. Between the Little Sioux River and Boyer River are the south and southwest oriented Maple River and […]
Abstract: This essay uses topographic map evidence to interpret landform origins in the Boyer River-Mosquito Creek drainage divide area located in Pottawatamie, Harrison, Shelby, and Crawford Counties, Iowa. The Boyer River and Mosquito Creek are south-southwest oriented Missouri River tributaries located in western Iowa with the Boyer River located north and west of Mosquito Creek […]
Abstract: This essay uses topographic map evidence to interpret landform origins in the Boyer River-Nishnabotna River drainage divide area located in Crawford, Carroll, Shelby, and Audubon Counties, Iowa. Evidence presented and discussed also includes regions between Nishnabotna River tributaries located in the four counties. The Boyer River and Nishnabotna River are southwest and south-southwest oriented Missouri […]
Abstract: This essay uses topographic map evidence to interpret landform origins in the Mosquito Creek-East Nishnabotna River drainage divide area located in Pottawattamie, Cass, Mills, and Montgomery Counties, Iowa. Mosquito Creek is a south-southwest oriented tributary joining the Missouri River at Council Bluffs, Iowa. The south-oriented Nishnabotna River is located east of Mosquito Creek and […]
Abstract: This essay uses topographic map evidence to interpret landform origins in the Missouri River-Tarkio River drainage divide area located in Fremont and Page Counties, Iowa and Atchison County, Missouri. The Missouri River flows in a south-southeast direction along the Fremont and Atchison County western borders. The Tarkio River and its major tributaries flow in […]
Abstract: This essay uses topographic map evidence to interpret landform origins for the West Nodaway River-Platte River drainage divide area located in Page, Taylor, Ringgold, and Adams Counties, Iowa. The West Nodaway River flows in a south direction across eastern Page County to join the southwest and south oriented East Nodaway River and to form the […]
Abstract: This essay uses topographic map evidence to interpret landform origins in the Des Moines River-Nisnabotna River drainage divide area located in Audubon and Guthrie Counties, Iowa. More specifically the Audubon and Guthrie County drainage divide is between headwaters and tributaries of the southeast-oriented Middle River (which is a Des Moines River tributary) and headwaters […]
Abstract: This essay uses topographic map evidence to interpret landform origins in the Des Moines River-Grand River drainage divide area located in Adair, Madison, Union, and Ringgold Counties, Iowa. The major drainage divide observed in the four county study region is the Middle River-Thompson River drainage divide, where the Middle River is a southeast and […]
Abstract: Topographic map evidence is used to interpret Des Moines River-Missouri River drainage divide area landform origins in Clarke, Lucas, and Monroe Counties, Iowa. Major Missouri River tributaries in the Clarke, Lucas, and Monroe County region are south-southeast oriented Thompson River and southeast oriented Chariton River with its east oriented Chariton Creek headwaters. Directly north of the […]
Abstract: Topographic map evidence is used to interpret the Platte River-Thompson River drainage divide area located in Adair, Union, Ringgold, and Decatur Counties, Iowa. The Grand River is a south-southwest, southeast, and south oriented Missouri River tributary which originates between the south-southwest oriented Platte River drainage basin and the south-southeast oriented Thompson River drainage basin […]
Abstract: Topographic map evidence is used to interpret landform origins in the Chariton River-Grand River drainage divide area located in Lucas, Decatur, and Wayne Counties, Iowa. The Chariton River flows in an east, northeast, and southeast direction in south central Iowa before entering the state of Missouri and then flowing in a south direction to […]
Abstract: Topographic map evidence is used to interpret landform origins in drainage divide areas between Chariton River tributaries and between the Chariton River and Mississippi River tributaries located in Appanoose County, Iowa. The Chariton River flows in a southeast and south-southeast direction across Appanoose County and south of Appanoose County flows in a south direction […]
Missouri River drainage basin landform origins research project 