Deposition-Sedimentation the processes that release eroded materials causing sediments to settle...
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![Page 1: Deposition-Sedimentation the processes that release eroded materials causing sediments to settle into a new location. A. Cause of Deposition: 1. A Decrease.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649f495503460f94c6b925/html5/thumbnails/1.jpg)
Deposition-SedimentationDeposition-Sedimentationthe processes that release eroded materials causing sediments to settle into a new
location. A. Cause of Deposition:A. Cause of Deposition:
1. A Decrease wind or water current velocity.
Mass Movements
Sand Dunes
Glacier
Moraine
Lake Bed
Beach
Flood Plain
Delta
![Page 2: Deposition-Sedimentation the processes that release eroded materials causing sediments to settle into a new location. A. Cause of Deposition: 1. A Decrease.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649f495503460f94c6b925/html5/thumbnails/2.jpg)
B.B. Factors of deposition:Factors of deposition:
Particle Characteristics
1. Density: High density sediments settle at a high rate.
2. Shape: Round particles settle fast before flat sediments.
3. Size: Larger particles settle faster than small particles.
Aluminum 2.7 g/ml
Lead 6.5 g/ml
![Page 3: Deposition-Sedimentation the processes that release eroded materials causing sediments to settle into a new location. A. Cause of Deposition: 1. A Decrease.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649f495503460f94c6b925/html5/thumbnails/3.jpg)
C. C. Patterns of deposited sedimentsPatterns of deposited sediments
1. Sorted Sediments:
Generally have the same size, shape, & consistency.
![Page 4: Deposition-Sedimentation the processes that release eroded materials causing sediments to settle into a new location. A. Cause of Deposition: 1. A Decrease.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649f495503460f94c6b925/html5/thumbnails/4.jpg)
2. Unsorted Sediments: Mixed sizes of sediments.
Glacial Till
Poorly Sorted
![Page 5: Deposition-Sedimentation the processes that release eroded materials causing sediments to settle into a new location. A. Cause of Deposition: 1. A Decrease.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649f495503460f94c6b925/html5/thumbnails/5.jpg)
3. Vertical Sorting:
In sediments of mixed size, the largest particles will settle to the bottom first with smaller material on top.
4. Graded Beds:
Show alternating layers of vertical sorting caused by cyclic events like seasonal floods.
![Page 6: Deposition-Sedimentation the processes that release eroded materials causing sediments to settle into a new location. A. Cause of Deposition: 1. A Decrease.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649f495503460f94c6b925/html5/thumbnails/6.jpg)
5. Horizontal Sorting: Particles are sorted by size; as stream velocity decreases, the largest particles are deposited first followed by sands, silts, clay.
• Sediment burial with
compaction & cementation
resulting in lithification.
![Page 7: Deposition-Sedimentation the processes that release eroded materials causing sediments to settle into a new location. A. Cause of Deposition: 1. A Decrease.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649f495503460f94c6b925/html5/thumbnails/7.jpg)
6. Wind Deposits:
Sediments which are sorted into tilted layers show cross bedding. The angle indicates the direction of current.
![Page 8: Deposition-Sedimentation the processes that release eroded materials causing sediments to settle into a new location. A. Cause of Deposition: 1. A Decrease.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649f495503460f94c6b925/html5/thumbnails/8.jpg)
Erosion-Depositional System:
Kinetic & Potential Energy exists within a stream. When the amount of material lost from erosion is the same gained by deposition a dynamic equilibrium is reached.
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Erosion-Depositional System A balance between erosion & deposition. (KE vs. PE)
1. Straight Channel
-Velocity Greatest In____________
-Erosion______________________
-Deposition____________________
2. Curved Channel
-Velocity Greatest _______________
-Erosion_______________________
-Deposition_____________________
![Page 10: Deposition-Sedimentation the processes that release eroded materials causing sediments to settle into a new location. A. Cause of Deposition: 1. A Decrease.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649f495503460f94c6b925/html5/thumbnails/10.jpg)
Stream Velocity controls deposition
Largest particles drop out first as flow decreases.