Category archives for Overview essays

Missouri River drainage basin landform origins in South Dakota, USA, overview essay

A geomorphic history based on topographic map evidence Abstract: This essay is an overview of information contained in more detailed essays describing topographic map evidence found along drainage divides between South Dakota Missouri River tributaries. The detailed essays can be found under SD Missouri River on this website’s sidebar category list. Overview essays and related […]

Elkhorn River drainage basin landform origins, northeast Nebraska, USA, overview essay

A geomorphic history based on topographic map evidence Abstract: This essay provides an overview of more detailed Elkhorn River drainage basin essays, which can be found under Elkhorn River on this website’s sidebar category list. All essays use topographic map evidence to interpret Elkhorn River drainage basin landform origins. The Elkhorn River drainage basin is […]

Loup River drainage basin landform origins, Nebraska, USA, overview essay

A geomorphic history based on topographic map evidence Abstract: This essay provides an overview of more detailed Loup River drainage basin landform origins essays, which can be found under Loup River on this website’s sidebar category list. Detailed essays illustrate and discuss topographic map evidence for all drainage divides surrounding the Loup River drainage basin […]

Platte River drainage basin landform origins, Colorado, Wyoming, and Nebraska, USA, overview essay

A geomorphic history based on topographic maps Abstract: This overview essay provides highlights from more detailed essays illustrating and describing topographic map evidence which is interpreted to determine origins of drainage divides between all major Platte River tributary drainage basins and Platte River drainage divides with all major adjacent drainage basins. Detailed essays upon which […]

Big Blue River drainage divide area landform origins, Nebraska and Kansas, USA

A geomorphic history based on topographic map evidence Abstract: This essay provides an overview of detailed essays describing landform origins along drainage divides in and adjacent to the Nebraska and Kansas Big Blue River drainage basin. The detailed essays can be found under Big Blue River on this website’s sidebar category list. All interpretations in […]

Solomon River drainage basin landform origins, Kansas, USA, overview essay

A geomorphic history based on topographic map evidence Abstract: This essay provides highlights from more detailed essays using topographic map evidence to interpret Solomon River drainage basin landform origins. The detailed essays can be found under Solomon River on this website’s sidebar category list. All interpretations of Solomon River drainage basin history in this overview […]

Kansas River drainage basin landform origins, Kansas, USA, overview essay

A geomorphic history based on topographic map evidence Abstract: This essay provides highlights from more detailed essays describing drainage divide origins for Kansas River and tributary drainage divide areas. The more detailed essays can be under Kansas River on this website’s sidebar category list. All interpretations are based on topographic map evidence, which is illustrated […]

Saline River drainage basin landform origins, Kansas, USA, overview essay

A geomorphic history based on topographic map evidence Abstract: This essay provides highlights from more detailed essays describing origins of drainage divides surrounding the Kansas Saline River drainage basin. The more detailed essays can be found under Saline River on this website’s sidebar category list. Interpretations in this overview essay and in detailed essays contained […]

Smoky Hill River drainage basin landform origins, Colorado and Kansas, USA, overview essay

A geomorphic history based on topographic map evidence Abstract: This is an overview essay providing highlights from detailed essays describing drainage divide origins within and surrounding the Colorado and Kansas Smoky Hill River drainage basin. The detailed essays can be found under Smoky Hill River on this website’s sidebar category list. All interpretations of drainage […]

Osage River drainage basin landform origins, Kansas and Missouri, USA, overview essay

A geomorphic history based on topographic map evidence Abstract: This overview essay provides highlights from a series of more detailed essays in which topographic map evidence is interpreted to determine Osage River drainage basin landform origins. The more detailed essays are found under Osage River on this website’s sidebar category list. The Osage River is […]

Missouri River drainage basin landform origins downstream from Kansas City, Missouri, USA

A geomorphic history based on topographic map evidence Abstract: This overview essay provides highlights of more detailed essays (found under MO Missouri River on sidebar category list) describing drainage divide areas for Missouri River tributaries downstream from Kansas City. Each of the detailed essays uses topographic map interpretation methods to determine origins of landform features […]

Platte River drainage basin landform origins, Iowa and Missouri, USA, overview essay

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 […]

Chariton River drainage basin landform origins, Iowa and Missouri, USA, overview essay

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 […]

Grand River drainage basin landform origins, Iowa and Missouri, USA, overview essay

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 […]

Montana Marias River drainage basin area landform origins, Montana, USA, overview essay

A geomorphic history based on topographic map evidence Abstract: This overview essay provides highlights from more detailed essays interpreting landform origins along drainage divides in and around the Montana Marias River drainage basin. The more detailed essays can be found under Marias River on the sidebar category list. The Marias River is a Missouri River tributary with […]

Gasconade River drainage basin area landform origins, Missouri, USA, Overview Essay

A geomorphic history based on topographic map evidence

The Gasconade River is a northeast and north-northeast oriented Missouri River tributary and flows from near Seymour, Missouri to join the east-oriented Missouri River, near Gasconade, Missouri. Major Gasconade River tributaries include north-oriented the Osage Fork, Roubidoux Creek, and the Big Piney River. This Gasconade River knol collection provides a summary of knols describing landform origins for all drainage divides surrounding the Gasconade River drainage basin. Knols being summarized are based entirely on illustrated topographic map evidence and interpret landform origins from a previously unexplored perspective of a deep glacial erosion and a thick ice sheet that melted fast paradigm. Topographic map evidence shown and discussed in these knols documents how the deep Gasconade River valley and its north-oriented tributary valleys were eroded by systematic reversals of an immense south-oriented flood, which was derived from a rapidly melting North American ice sheet. Prior to headward erosion of the deep Missouri River valley flood waters flowed south across what is now the Gasconade River drainage basin to what was then the newly eroded southeast-oriented White River valley and what were then actively eroding south-oriented White River tributary valleys. Headward erosion of the deep east-oriented Missouri River valley beheaded the south-oriented flood flow routes in sequence from east to west. Flood waters on north ends of beheaded flood flow routes reversed flow direction to erode deep north-oriented valleys. The actively eroding north-oriented valleys captured significant south-oriented flood flow from west of the actively eroding Missouri River valley head. The captured flood water moved in southeast, east, and northeast directions and caused the north-oriented valleys, such as the Gasconade River valley, to erode headward toward the southwest and to also behead south-oriented flood flow routes in sequence from east to west. The Gasconade River valley was able to erode headward for a significant distance faster than the actively eroding Missouri River valley and its Osage River tributary valley were able to behead south-oriented flood flow routes supplying flood waters to the actively eroding Gasconade River valley. Headward erosion of the deep Osage River valley from the actively eroding Missouri River valley finally beheaded and captured all flood flow routes to the what had been the actively eroding Gasconade River valley. Knols in this collection illustrate and discuss how topographic map evidence including positions and orientations of present day valleys, the nature of Gasconade River valley and tributary valley meanders, and through valleys crossing present day drainage divides, all provide evidence supporting this flood origin interpretation.

Montana Teton River drainage basin landform origins, overview essay

A geomorphic history based on topographic map evidence Abstract: This is an overview essay for a series of essays describing drainage divide areas in and surrounding the Montana Teton River drainage basin. Essays describing specific Teton River drainage divide areas can be found listed under the sidebar Teton River category. The Teton River originates along the […]

Montana Sun River drainage basin landform origins, overview essay

A geomorphic history based on topographic map evidence Abstract: This essay is an overview of six essays describing drainage divide areas in and surrounding the Montana Sun River drainage basin. Essays are based on Sun River drainage basin topographic map evidence and are listed under the Sun River category (see sidebar category list). The Sun […]

Montana Dearborn River drainage basin landform origins overview essay

Abstract: This is essay is an introduction to a collection of essays describing drainage divide areas in and surrounding the Montana Dearborn River drainage basin. This essay contains an overview of more detailed information contained in the five much more detailed essays, which can be found under the Dearborn River category (see sidebar). The Dearborn River […]

Montana Smith River drainage basin landform origins overview essay

This essay is an overview of a essays describing landform origins for drainage divides between Montana’s Smith River tributaries and between the Smith River drainage basin and adjacent drainage basins. The Smith River is a north-northwest oriented Missouri River tributary located in central Montana. The north-northwest oriented Smith River (and South Fork Smith River) valley […]