Types of Landforms Caused by Erosion & Deposition

1. Types of Landforms Caused by Erosion & Deposition LEQ: How do erosion and deposition affect Earth’s surface?

2. Remember…. • Landforms created when sediment is removed from an area are caused by __________. • Landforms created when sediment is placed or dropped in a new area are caused by __________________.

3. Erosion by Gravity • What erosional force causes Mass Movements? • _______________ • Name the four types of mass movement. • _____________/__________ • _______________ • _______________ • _______________

4. Erosion by Gravity _________ _________lide _____________ ___________

5. Running Water • Any water that runs over the Earth’s surface is considered __________. • Moving water is a MAJOR agent of __________! • Some areas have more runoff than others. • HILLY areas have more runoff than flat areas. • Areas with a LOT of rain have more runoff than areas with little rain. • Areas with FEW plants have more runoff than areas with many plants.

6. Running Water • Like the other agents of erosion, running water creates MANY different Landforms. • _______________ • _______________ • _____________ Fan (p. 215) • Meander • ______________ • Flood Plains • Deltas • Let’s look at the picture & decide if they were created by erosion or deposition (p. 216-217)

7. Running water • V-Shaped Valley • Running Water _________ • River flows through a deep ____- _________ valley near its source. As the river flows, it cuts the valley ________.

8. Running Water

9. Running Water cont. • Waterfalls • Running water___________ • When the river flows over hard rock that is difficult to erode it creats steep drops or waterfalls.

10. Running Water - Waterfall

11. Running Water cont. • Alluvial Fans • Running Water __________ • A wide, sloping deposit of sediment formed where a stream leaves a mountain range.

12. Running Water – _________ _______

13. Running Water cont. • Meanders • Running Water _________ • A loop-like bend in the course of a river (p. 214)

14. Running water - _________

15. Running Water cont. • Oxbow Lake • Running Water _________ • A meander that has been cut off from the river. (p.214)

16. Running water – ________ _______ Lake

17. Running Water cont. • Flood Plains • Running water ___________ • The FLAT area on the banks of the river where rich soil develops when the river drops sediments when it floods.

18. Running Water – _________ ________

19. Running Water cont. • Deltas • Running Water ___________ • Where the river flows into the ocean, it deposits sediments, forming a delta.

20. Running water - _________

21. Find Waves… • Wave Cut Cliff • Wave __________ • A cliff cut away by waves • Spit • Wave ____________ • Formed as sand deposits along the shore (looks like a finger)

22. WAVES CONT. • Sand Bar • Wave _____________ • Formed by wave action; deposit of sand.

23. PICTURES

24. Find Groundwater… • Caves • Groundwater _______________ • Water reacts with limestone in rocks & dissolves it, leaving a cave behind. • Stalagmite • Groundwater DEPOSITION • Slow dripping builds up cones from the cave floor.

25. GROUNDWATER CONT. • Stalactite • Groundwater _______________ • Hangs like an icicle from the roof of cave; deposit of calcite • Karst Topography • Groundwater EROSION • A sinkhole created when the roof of a cave collapses

26. PICTURES

27. Karst topography

28. Find Wind… • Loess • Created by Wind ___________ • Fine, wind deposited sediment • Sand Dune • Wind DEPOSITION • Found near beaches & deserts; hills of sand

29. PICTURES

30. Find Glaciers… • U-Shaped Valley • Glacial ____________ • A valley scooped out by a glacier • Kettle • Glacial _____________ • Forms when a depression, left from glacial till, is filled in by melting ice.

31. GLACIERS CONT. • Moraine • Glacial ___________Formed where a glacier deposits mounds or ridges of till

32. PICTURES