We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
supports HTML5 video
Published byMohammed Barrus
Modified over 4 years ago
Oxbow Lakes By Cara
What is an Oxbow Lake? An oxbow lake is a crescent shaped lake lying beside the middle course of a river. It is formed when a bend in the river is cut off from the main channel by forces of erosion.
Due to greater volumes of water carried by the river in low land areas , lateral erosion becomes more dominant than vertical erosion. This causing the channel to cut into the banks forming meanders.
A river moves fastest on the outside banks.
Meanwhile, on the inside bank of the river, the water flows more slowly, leading to the deposit of sediment.
Gradually the inside banks are filled in with accumulated deposits and the outside bends extend further and further, forming a wide loop in the river.
. As the outer banks of a meander continue to be eroded through processes such as hydraulic action the neck of the meander becomes narrow and narrower.
Eventually the two outer bends meet and the river cuts through the neck of the meander . The water now takes its shortest route rather than flowing round the bend.
Deposits gradually seals of the old meander bend forming a new straighter river channel. Leaving the old meander bend is isolated from the main channel as an oxbow lake.
Erosion and Deposition
Earthshapes Unit RIVERS Vincent Raeburn Linlithgow Academy
Meanders Lesson 8 – page 7.
The Middle and Lower Course of a River
Rivers: Profiles & Landforms
To be able to able landforms created in the middle course
Rivers Location Profiles Processes Landforms.
The transport of weathered materials…
The River Seven By Tyler. The Soure The source is the start or the beginning of a river. The source of a river is usually found in the hills or mountains.
The River Course Features of the Upper Course Potholes Waterfalls
wriggling like a snake down the
Stages of a River Stage:Upper Course 1. Source 2. Waterfall
November 14, 2013 Warm-Up Agenda How does erosion change a landscape?
Erosion The transport of earth materials from one place to another.
Recap Rivers Rivers work hard. They are always E________ and moving this material downstream (T __________). Rivers are eroding down the way and across.
Changing Earth’s Surface
Water Erosion Chapter 3 Section 2.
Chapter 3 Section 2 Pages 72-81
© 2018 SlidePlayer.com Inc. All rights reserved.