Archives for December, 2011

Elkhorn River-Loup River drainage divide area landform origins between Shell Creek and Beaver Creek, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The Elkhorn River-Loup River drainage divide area between Shell Creek and Beaver Creek, Nebraska, was eroded by massive southeast-oriented floods, which before being beheaded by Elkhorn River headward erosion flowed to what was probably a newly eroded east-oriented Loup River-Platte River valley. Evidence supporting this interpretation […]

Beaver Creek-Cedar River drainage divide area landform origins between South Fork Elkhorn River and Loup River, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The Beaver Creek-Cedar River drainage divide area between the South Fork Elkhorn River and the Loup River was eroded by a massive southeast-oriented flood. Evidence for the southeast-oriented flood flow is found in the present day orientation of southeast-oriented Beaver Creek and Cedar River valleys and […]

Elkhorn River-Loup River drainage divide area landform origins in Rock, Holt, and Garfield Counties, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The Elkhorn River-Loup River drainage divide area in Rock, Holt, and Garfield Counties, Nebraska was eroded by a massive southeast-oriented flood, which also deposited deltaic sediments in the region. Subsequent eolian activity has created sand dunes and otherwise obscured the regional drainage history, although present day […]

Cedar River-North Loup River drainage divide area landform origins in Valley, Greeley, and adjacent counties, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The southeast-oriented Cedar River and North Loup River valleys in Valley, Greeley, and adjacent counties drain to the northeast-oriented Loup River, which flows along the north edge of the large northeast-oriented Platte River valley. Topographic map evidence demonstrates the southeast-oriented Loup River tributary valleys and their […]

Loup River-Platte River drainage divide area landform origins between Kearney and Columbus, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The Loup River-Platte River drainage divide area between Kearney and Columbus records the history of two immense converging glacial melt water floods during their central Nebraska flood flow events. An immense southeast-oriented flood flowed from the northwest into Nebraska, where late during the flood history it […]

North Loup River-Middle Loup River drainage divide area landform origins in Valley, Sherman, and Howard Counties, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The North Loup River-Middle Loup River drainage divide area in Valley, Sherman, and Howard Counties was eroded by immense southeast-oriented floods, which eroded the southeast-oriented North and Middle Loup River valleys headward from what was a newly eroded and large northeast-oriented Loup River-Platte River valley. Evidence […]

Middle Loup River-Mud Creek drainage divide area landform origins in Custer, Valley, and Sherman Counties, Nebraska, USA

A geomorphic history based topographic map evidence Abstract: The Middle Loup River-Mud Creek drainage divide area in Custer, Valley, Sherman Counties, Nebraska was eroded by an immense southeast-oriented flood that flowed across the entire drainage divide area. Initially flood waters flowed across a topographic surface at least as high as the highest drainage divide elevations […]

Mud Creek-South Loup River drainage divide area landform origins in Custer, Sherman, and Buffalo Counties, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The Mud Creek-South Loup River drainage divide area in Custer, Sherman, and Buffalo Counties was eroded by immense southeast-oriented floods , which initially flowed on a topographic surface at least as high as the highest drainage divide elevations today. Evidence supporting this flood erosion interpretation includes […]

South Loup River-Platte River drainage divide area landform origins in Logan, Lincoln, Custer, and Dawson Counties, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The South Loup River-Platte River drainage divide area in Logan, Lincoln, Custer, and Dawson Counties, Nebraska, was eroded by a massive southeast and south-southeast oriented flood flowing across the entire drainage divide area. Evidence for the flood flow is seen in present day valley alignments, large […]

Snake Creek-North Platte River drainage divide area landform origins south and east of Alliance, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: Topographic map interpretation methods are used to determine landform origins in the Snake Creek-North Platte River drainage divide area south and east of Alliance, Nebraska. The Snake Creek-North Platte River drainage divide area south and east of Alliance is located in the western Nebraska Sand Hills […]

Platte River-Wahoo Creek drainage divide area landform origins in Saunders County, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The Platte River-Wahoo Creek drainage divide area was eroded by a massive south-southeast oriented flood, with flood waters systematically captured by headward erosion of the Wahoo Creek valley and tributary valleys and subsequently captured by headward erosion of the Platte River valley. Flood waters eroded a […]

Platte River-Salt Creek drainage divide area landform origins in Butler, Saunders, and Lancaster Counties, Nebraska, USA

A geomorphic history based on topographic evidence Abstract: The Platte River-Salt Creek drainage divide area in Butler, Saunders, and Lancaster Counties was eroded by an immense south-southeast and southeast oriented flood. Flood waters were first captured by headward erosion of the south-southeast and east oriented Platte River valley and the southeast-oriented Wahoo Creek valley from […]

Platte River-Missouri River drainage divide area landform origins in Cass, Lancaster, and Otoe Counties, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The Platte River-Missouri River drainage divide area in Cass, Lancaster, and Otoe Counties, Nebraska was eroded by massive southeast and south oriented floods at the time the deep Missouri River valley eroded headward into the region. Flood waters were probably melt water floods from a rapidly melting […]

Platte River-Big Blue River drainage divide area landform origins in Hamilton, Polk, Butler, York, and Seward Counties, Nebraska, USA

A geomorphic history based on topographic map evidence Abstract: The Platte River-Big Blue River drainage divide area in Hamilton, Polk, Butler, York, and Seward Counties was eroded by a massive east oriented flood, which was first captured by headward erosion of the south-southeast oriented Big Blue River and later captured by headward erosion of the deeper […]

Big Blue River-Big Nemaha River drainage divide area landform origins in southeast Nebraska, USA

A geomorphic history based on topographic map evidence Abstract The Big Blue River-Big Nemaha River drainage divide area in southeast Nebraska was eroded by massive south and southeast oriented floods. Floods were probably from a rapidly melting ice sheet located north and northwest of the drainage divide area. Initially flood waters flowed across a topographic […]

South Fork Big Nemaha River-Missouri River drainage divide area landform origins in Richardson County, Nebraska and Nemaha, Brown, and Doniphan Counties, Kansas, USA

A geomorphic history based on topographic map evidence Abstract: The South Fork Big Nemaha River-Missouri River drainage divide area in Richardson County, Nebraska and Nemaha, Brown, and Doniphan Counties, Kansas was eroded by massive southeast and south oriented floods. Flood waters were probably derived from a rapidly melting thick North American ice sheet located north and […]

Delaware River-Missouri River drainage divide area landform origins in Brown, Doniphan, and Atchison Counties, Kansas, USA

A geomorphic history based on topographic map evidence Abstract: Topographic map interpretation methods are used to determined that the Delaware River-Missouri River drainage divide area in Brown, Doniphan, and Atchison Counties, Kansas was eroded by massive southeast and south oriented floods at the time the Missouri River and Delaware River valleys and their tributary valleys […]

Delaware River-Missouri River drainage divide area landform origins in Jefferson, Leavenworth, and Wyandotte Counties, Kansas, USA

A geomorphic history based on topographic map evidence Abstract: This essay uses topographic interpretation methods to determine landform origins in the Delaware River-Missouri River drainage divide area located in Jefferson, Leavenworth, and Wyandotte Counties, Kansas.The Delaware River-Missouri River drainage divide area in Jefferson, Leavenworth, and Wyandotte Counties, Kansas was eroded by massive south, southeast, and […]

Big Blue River-South Fork Big Nemaha River drainage divide area landform origins in Pawnee County, Nebraska and Marshall and Nemaha Counties, Kansas, USA

A geomorphic history based on topographic map evidence Abstract: The Big Blue River-South Fork Big Nemaha River drainage divide in Pawnee County, Nebraska and Marshall and Nemaha Counties, Kansas was eroded by immense southeast and south oriented floods, which were probably derived from a rapidly melting North American ice sheet. The present day north-oriented South-Fork Big […]

Mill Creek (Big Blue River)-Republican River (Kansas River) drainage divide area landform origins in Washington, Clay, and Riley Counties, Kansas, USA

A geomorphic history based on topographic map evidence Abstract: The Mill Creek (Big Blue River)-Republican River (Kansas River) drainage divide area in Washington, Clay, and Riley Counties, Kansas was eroded by massive south-oriented floods as the deep Kansas River-Republican River valley and the deep Big Blue River-Little Blue River valley and their tributary valleys eroded […]

Little Blue River-Republican River drainage divide area landform origins in Nuckolls and Thayer Counties, Nebraska and Republic County, Kansas, USA

A geomorphic history based on topographic map evidence Abstract: Immense south-oriented floods eroded the Little Blue River-Republican River drainage divide area in Nuckolls and Thayer Counties, Nebraska and Republic County, Kansas. Flood waters were probably derived from a rapidly melting thick North American ice sheet. Flood waters were captured by headward erosion of the southeast-oriented […]