Tag archives for Geomorphology

South Grand River-Little Osage River drainage divide area landform origins in Cass, Bates, and Vernon Counties, Missouri, USA

Abstract: The South Grand River-Little Osage River drainage divide area in Cass, Bates, and Vernon Counties, Missouri is located just east of the north-south oriented Kansas-Missouri state line and was eroded by immense south-oriented floods. Flood waters were derived from a rapidly melting North American ice sheet and were captured by headward erosion of deep […]

Missouri River-Osage River drainage divide area landform origins in Jackson and Cass Counties, Missouri, USA

Abstract: The Missouri River-Osage River drainage divide area in Jackson and Cass Counties, Missouri is in reality the Missouri River-South Grand River drainage divide area with the South Grand River being a southeast-oriented Osage River tributary. The Missouri River-South Grand River drainage divide area was eroded by immense south oriented floods from a rapidly melting North […]

Missouri River-Blackwater River drainage divide area landform origins in Lafayette and Johnson Counties, Missouri, USA

Abstract: The Missouri River-Blackwater River drainage divide in Lafayette and Johnson Counties, Missouri is a west to east oriented drainage divide between the east-northeast and southeast oriented Missouri River to the north and the east, northeast, and east oriented Blackwater River to the south. The drainage divide area was eroded by immense south oriented floods derived […]

Blackwater River-South Grand River drainage divide area landform origins in Johnson and Henry Counties, Missouri, USA

Abstract: The Blackwater River-South Grand River drainage divide area in Johnson and Henry Counties, Missouri is actually the Blackwater River-Osage River drainage divide area and was eroded by immense south oriented floods derived from a rapidly melting North American ice sheet. Flood waters in Henry County were captured by headward erosion of the deep Osage River-South […]

Osage River-Weaubleau Creek drainage divide area landform origins in St Clair, Benton, and Hickory Counties, Missouri, USA

Abstract: The Osage River-Weaubleau Creek drainage divide in St Clair, Benton, and Hickory Counties is bounded on the east by the north-oriented Pomme de Terre River, on the west by north, northwest, and north oriented Weaubleau Creek, and on the north by the east-oriented Osage River, and is drained primarily by north-oriented streams. North-oriented valleys […]

Little Sac River-Pomme de Terre River drainage divide area landform origins in Polk, Dalls, Greene, and Webster Counties, Missouri, USA

Abstract: The Little Sac River-Pomme de Terre River drainage divide area in Polk, Dallas, Greene, and Webster Counties, Missouri is the drainage divide between two north-oriented Osage River tributaries and evolved during a massive reversal of an immense south-oriented flood. South-oriented flood waters were derived from a rapidly melting North American ice sheet and flowed […]

Pomme de Terre River-Niangua River drainage divide area landform origins in Polk, Dallas, and Webster Counties, Missouri, USA

Abstract: The Pomme de Terre River-Niangua River drainage divide area in Polk, Dallas, and Webster Counties, Missouri is the southern half of the drainage divide between two north-oriented Osage River tributaries and was eroded and created during a massive reversal of an immense south oriented flood. The south oriented flood waters were derived from a rapidly melting […]

Niangua River-Osage Fork (Gasconade River) drainage divide area landform origins in Dallas, Laclede, and Webster Counties, Missouri, USA

Abstract: The Niangua River-Osage Fork (Gasconade River) drainage divide area in Dallas, Laclede, and Webster Counties, Missouri is the drainage divide between a north-oriented Osage River tributary to the west and a northwest and northeast oriented Gasconade River tributary to the east and was eroded by immense south-oriented floods which were beheaded and reversed by […]

Osage Fork (Gasconade River)-Gasconade River drainage divide area landform origins in Laclede, Pulaski, Webster, and Wright Counties, Missouri, USA

Abstract: The Osage Fork (Gasconade River)-Gasconade River drainage divide area in Laclede, Pulaski, Webster, and Wright Counties, Missouri was eroded by immense south-oriented floods, which flowed across the entire state of Missouri and adjacent states. Flood waters were derived from a rapidly melting North American ice sheet and were captured in sequence from south to […]

Gasconade River-White River drainage divide area landform origins in Webster, Wright, and Douglas Counties, Missouri, USA

Abstract: The Gasconade River-White River drainage divide in Webster, Wright, and Douglas Counties, Missouri consists of an asymmetric west-to-east oriented drainage divide between the south-oriented White River drainage basin and the north-oriented Gasconade River drainage basin and an asymmetric north-to-south oriented drainage divide between east oriented Gasconade River drainage basin and the west-oriented White River drainage […]

Gasconade River-White River drainage divide area landform origins in Texas County, Missouri, USA

Abstract: The Gasconade River-White River drainage divide area in Texas County, Missouri is a north-south oriented drainage divide between the north-oriented Big Piney River drainage basin on the west and the southeast-oriented Current river drainage basin on the east with the south-oriented North Fork White River drainage basin west of the Big Piney River drainage […]

Gasconade River-Big Piney River drainage divide area landform origins in Laclede, Pulaski, and Texas Counties, Missouri, USA

Abstract: The Gasconade River-Big Piney River drainage divide in Laclede, Pulaski, and Texas Counties, Missouri was eroded during a massive reversal of immense south-oriented floods. Flood waters were derived from a rapidly melting North American ice sheet and for a time flowed south across Laclede, Pulaski, and Texas Counties to what was then the newly […]

Osage River-Gasconade River drainage divide area landform origins in Osage, Miller, Maries, and Pulaski Counties, Missouri, USA

Abstract: The Osage River-Gasconade River drainage divide area in Osage, Miller, Maries, and Pulaski Counties, Missouri was eroded by immense south oriented floods which were captured and diverted to flow in southeast, east, and northeast directions by headward erosion of deep north-oriented Missouri River and Osage River tributary valleys. Headward erosion of the deep east-oriented Missouri […]

Missouri River-Gasconade River drainage divide area landform origins in Osage and Gasconade Counties, Missouri, USA

Abstract: The Missouri River-Gasconade River drainage divide in Osage and Gasconade Counties, Missouri is the drainage divide between the northeast and east oriented Missouri River and the Gasconade River, which is a northeast and north-northeast oriented Missouri River tributary. The Missouri River-Gasconade River drainage divide area was eroded by immense south-oriented floods derived from a […]

Floyd River-Little Sioux River northern drainage divide area landform origins, northwest Iowa, USA

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 […]

Little Sioux River-North Raccoon River drainage divide area landform origins in Cherokee, Buena Vista, and Sac Counties, Iowa, USA

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 […]

Little Sioux River-Boyer River drainage divide area, western Iowa, USA

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 […]

Boyer River-Mosquito Creek drainage divide area landform origins in Pottawattamie, Harrison, Shelby, and Crawford Counties, Iowa, USA

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 […]

Boyer River-Nishnabotna River drainage divide area landform origins in Crawford, Carroll, Shelby, and Audubon Counties, Iowa, USA

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 […]