RESEARCH COMMONS
LIBRARY

Morphology Of The Lower Missouri River: The Processes Involving Development Of Highly Sinuous Gooseneck Loop Cutoffs Exposed In The Surficial Deposits Of The River Floodplain

ResearchCommons/Manakin Repository

Morphology Of The Lower Missouri River: The Processes Involving Development Of Highly Sinuous Gooseneck Loop Cutoffs Exposed In The Surficial Deposits Of The River Floodplain

Show full item record

Title: Morphology Of The Lower Missouri River: The Processes Involving Development Of Highly Sinuous Gooseneck Loop Cutoffs Exposed In The Surficial Deposits Of The River Floodplain
Author: Carlin, Daniel Earl
Abstract: Mapping the surficial deposits of the Missouri River from Sioux City, Iowa to Mondamin, Iowa brought to light a prominent set of landforms exposed in the floodplain and which are also easily visible via aerial photography. The landforms are segments of highly sinuous channel fills that exhibit the characteristic of turning up-dip against the natural southern gradient of the river valley. These prominent channel scars, of which there are only five exposed in the study area, take on a recognizable “gooseneck” shape. The allostratigraphy for the reach of the Missouri River floodplain from Sioux City to Mondamin was mapped during the summers of 2009 and 2010. Soil samples were collected in the loops for OSL dating to determine the ages of these loops and determine any time relationship between them. The purpose of this study is to assess how they initiated, developed and evolved. The gooseneck meanders in this study developed via a combination of westward river migration owing to later valley tilt by tectonic uplift and river mechanics on the margins of braided and meandering conditions that temporarily and randomly force the Missouri River into a runaway meander pattern when meandering is locally achieved. They loops eventually succumb to neck cutoff.
URI: http://hdl.handle.net/10106/9566
Date: 2012-04-11

Files in this item

Files Size Format View
Carlin_uta_2502M_11513.pdf 68.76Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record

Browse

My Account

Statistics

About Us