april 23 notes test 4

april 23 notes test 4 - GEO 1401 Test 4 Notes Stream...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
GEO 1401 Test 4 Notes Stream Deposits and Features 1. Floodplain- the portion of a river system that is covered by water during flood stage. 2. Meander- a twisting winding course of looping stream bends a. Meander loops migrate throughout the floodplain (swoops through the surface) b. Rivers are dynamic- they change constantly c. Meanders erode on the outside of the bend and deposit sediment on the inside of the bend d. Entrenched meander- rapid uplift of the land causes rapid down cutting 3. Point bar- sand or gravel deposited on the inside of a meander bend. Deposition. (drops sediment bar on the inside of the loop) 4. Cut bank- the steep walled part of the outside of the meaner. Erosion. (water speeds up around the outside and chews up on the wall. This is why the meander loops-rivers- migrate back and forth across flood plains ) a. Erodes anything around it making it flat b. As meanders migrate, they leave behind a layer of sand and gravel c. Would you want to build on a flood plain? No! d. Would you build your house on a cut bank or point bar? Point bar. It will flood but the house will still be there when the water goes back down. 5. Oxbow lake- isolated meander loops. a. Forms when a stream cuts through a meander neck 6. Natural levee- a curvy-linear mound of sand and gravel that parallels the river a. Before flood- no levees b. During flood stage- water level rises, carries sand, slows down, and drops the coarse grained sediment right next to the river causing mounds of coarse grained sediment that parallels the rivers. c.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/30/2008 for the course GEO 1401 taught by Professor Dworkin during the Spring '08 term at Baylor.

Page1 / 4

april 23 notes test 4 - GEO 1401 Test 4 Notes Stream...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online