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Weathering, Erosion, & Deposition part 1

Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

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Page 1: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Weathering, Erosion, & Deposition

part 1

Page 2: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Part I. WeatheringA. Weathering is the physical or chemical break-

down of rocks or minerals at or near the earth’s surface - Breaking rock into pieces

B. ONLY rocks at the surface can weather

C. TypesA. Physical – breaking rocks w/o changing

composition

B. Chemical – breaking rocks by chemically changing the minerals

Page 3: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Chemical Weathering Agents

A. Water – dissolves certain rocks (salt)

B. Aira) Oxidation (rusting) – O2 combines w/

water and reacts with minerals containing iron

b) CO2 – combines w/ water to make carbonic acid, dissolves limestone

c) Plants – lichens make acid that dissolves rock

Page 4: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Chemical Weathering Agents

Lichens

Oxidation

Carbonic Acid

Oxidation

Page 5: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Oxidized rocks in Utah

Page 6: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Carbonic acid at work!

Page 7: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the
Page 8: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Hydrolysis of feldspar

Feldspar

Clay forming

from hydrolysis

of feldspar

Page 9: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Acid rain at work!

http://gallery.hd.org/_exhibits/natural-science/_more1999/_more05/acid-rain-stone-erosion-of-statue-1-AJHD.jpg
Page 10: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Review of chemical weathering• Oxidation (rust)• Acid rain• Carbonic acid

Water + Carbon dioxide Carbonic acid• Water dissolving rocks with acids mixed in it• Hydrolysis-water reacting with rock causing chemical

change

feldspar + water = clay

Page 11: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Physical WeatheringA. Frost action

1. Water enters cracks in rocks, as it freezes it expands breaking the rock

http://gsc.nrcan.gc.ca/landscapes/photos/melville/batch_2/img0068.jpg
Page 12: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Physical WeatheringB. Abrasion

1. Grinding, rolling & scraping of rocks together. Breaks off sharp edges, rounding the rock

2. Caused by running water, waves, wind and glaciers

Page 13: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Physical WeatheringC. Plant action

1. Plant roots work into rocks breaking the rock apart as it grows

Page 14: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Physical WeatheringD. Exfoliation

1. Peeling off the outer layers of rock.

2. Caused by repeated heating or cooling

Page 15: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Review of physical weathering

• Frost action-alternating temperatures above and below freezing causes rock to crumble

• Abrasion-the physical grinding of rocks along a surface

• Root action -roots break a part land as they grow into the ground

• Burrowing animals• Exfoliation-peeling of rock layers due to crustal

unloading

Page 16: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Exfoliation examples

Page 17: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Abrasion

Page 18: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Frost action at work!

http://pavementinteractive.org/index.php?title=Image:SR_20_Freeze_Thawing_1.jpg
http://pavementinteractive.org/index.php?title=Image:SR_20_Freeze_Thawing_1.jpg
Page 19: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Root action

Page 20: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Burrowing animals

http://www.hedweb.com/rabsfile.htm
Page 21: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Factors Affecting WeatheringA. Climate

1. Hot, dry climate – very little weathering

2. Warm, moist climate – rapid chemical

3. Cold, moist climate – strong frost action

Page 22: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Factors Affecting Weathering

B. Type of Rock1. Igneous and Metamorphic – react

SLOWLY, more dense

2. Sedimentary – weather rapidly

Page 23: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Factors Affecting WeatheringC. Particle Size

1. As rocks break into smaller pieces, it weathers faster (more surface area exposed)

0

5

10

15

20

25

30

35

1 2 3 4 5

Particle Size

Rat

e o

f W

eath

erin

g

Page 24: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Review Factors affecting rate of weathering

• Exposure to the elementsThe closer a rock is to the earth’s surface, the more weathering will occur

• Particle sizeWhen the rock particles are smaller, the rate of weathering increases

• Mineral compositionSome minerals are more resistant to weathering than others

• ClimateWarm, moist climates chemicalCold, dry climates physical

Page 25: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

SOILS• Soils are a mixture of rocks, minerals and

organic material

Page 26: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Soil

A. Final product of weathering

B. Soil composition1. Inorganic material – pieces of weathered

rock

2. Humus – organic material from decayed plants and animals; provides nutrients for growth

Page 27: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Classes of Soil

A. Soil Types1. Residual Soil

a. Soils that stay where they are formed

b. Soil composition matches the rocks underneath, granite rock = granite in soil

2. Transported Soila. Soils that were carried to other locations

b. Soil does NOT match, granite rock = NO granite in soil

Page 28: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Soil development depends on…

• Climate

• Biological activity

• Slope of the land

• Time

Page 29: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Soil profile

Page 30: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the
Page 31: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Know this profile!Know this profile!

Page 32: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Porosity and permeability of soils

• Porosity- amount of open spaces within soil particles

Page 33: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

• Permeability- amount of water that passes through a soil

Page 34: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Weathering, Erosion, & Deposition

part 2

Page 35: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Part 2 - Erosion

A. Carries away pieces from weathering

B. Most soils are different from bedrock under them (transported soils)

C. Gravity is MAIN force behind erosion

Page 36: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

What does erosion mean?

• Transport of weathered material.

• Agents of erosion are: wind, water, ice (glaciers) and gravity.

• Water is the most common erosional agent

Page 37: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Mass movement notes

What comes up, must come down!

Page 38: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

What is mass movement?

• Mass movement: When gravity pulls geologic materials down slope

• Driving force gravity

• Resisting force friction

Page 39: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Soil creep

Velocity: Less than 1 cm/year

Page 40: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Debris flow

Velocity:1 mm/day to 1 km/hour

Page 41: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Mud flow

Velocity:1-5 Km/hour

Page 42: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Rock fallsVelocity: Greater than 4 km/hour

Page 43: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the
Page 44: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Conclusion

• Mass movement is the downward movement of rock, snow, soil and ice as a result of gravity.

• When the driving force>resisting force slope failure occurs

• Order of increasing speed:

soil creepdebris flowmud flowrock fall

Page 45: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

A. Gravity (Review)1. Landslides – rapid movement of rock

material down hill

2. Slumping – small landslides

3. Creep – VERY slow mvmt of material

4. Talus – piles of rock found at base of very steep slopes

Page 46: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

SlumpingLandslide

Page 47: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of ErosionTalus

Creep

Page 48: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of ErosionB. Wind

1. Carries fine grained sediments about 1 meter above ground

2. Grains are lifted and bounced along

3. Wears away rocks at the base

4. Dunes – piles of wind blown sand

Page 49: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

Page 50: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

Page 51: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of ErosionC. Glaciers

1. Masses of frozen water on ground

2. Valley (alpine) glaciersa. “rivers of ice”

b. Found at high altitudes in mountains

Page 52: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

3. Continental glaciersa. Large sheets of ice covering large areas of

surface (Greenland, Antarctica)

Page 53: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

4. Formed in areas where snow does not melt, keeps building up and is compacted into ice

5. As Ice builds up, pressure increases at bottom, causing ice to flow (cm to m per day)

Page 54: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

6. As glaciers move, they carry materials of ALL sizes (sand to boulders)

7. Materials carried cause bedrock under glacier to be gouged and scraped

Page 55: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

VIII. Agents of Erosion

Page 56: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

8. Glacier Landscapesa. U-shaped valleys

b. UNSORTED rock material when glacier melts (till)

c. Drumlins – groups of long oval hills

d. Eskers – winding ridges formed in tunnels under ice

e. Kettles – large piece of ice breaks off glacier making a hole, ice melts leaving the hole. Kettle lake – hole is filled with water (Beaver Lake)

Page 57: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

Page 58: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

VIII. Agents of Erosion

Kettle Lake

DrumlinGlacial Till

Page 59: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the
Page 60: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

The Hydrologic (Water) Cycle

Page 61: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Water table

Page 62: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

D. Running Water1. MOST important (moves most material)

2. Ways of carrying sedimentsa. Solution – dissolved materials (salt)

b. Suspension – very fine particles (silt) suspended in water, looks muddy

c. Bouncing – pebbles bounced along stream

d. Rolling and sliding – largest particles moved without being lifted

Particle Transport

http://www.classzone.com/books/earth_science/terc/content/visualizations/es1303/es1303page01.cfm?chapter_no=visualization
Page 63: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

3. Velocitya. Speed of the water flow

b. Depends on slope and volume (stream discharge)

c. Greater slope = greater velocity

d. Greater volume = greater velocity

Page 64: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

4. Sediments Carrieda. Size

1) FAST streams can carry LARGER sediments

b. Quantity (amount)1) MORE volume carries MORE sediment

2) Even though a fast moving stream can carry larger rocks, a slow moving stream with greater volume can carry more sediment (Mississippi River)

Page 65: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

How fast does a stream need to be flowing to carry a cobble?

About 190 cm/sec

Page 66: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

What kind of particle can a stream carry if it is going 400 cm/sec?

Boulder

Page 67: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

How fast does a stream need to be flowing to carry a 1.0 cm particle?

100 cm/sec

Page 68: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

5. Effects of moving streamsa. Carry sediments

b. Deepen and widen stream bed as it drags and carries its sediments

c. Abrasion happens (rocks becoming rounded)

Page 69: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion6. Stages of Stream Development

a. Youth1) Steep gradients

2) Rapid downcutting (carries rocks and pebbles)

3) V shaped valley

4) Has waterfalls or rapids

5) Straight path

Page 70: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosionb. Mature

1) Less steep, less velocity

2) Wind around obstructions forming loops

3) Carries silt and clay (no rocks)

4) Larger volume = more sediment than youth

Page 71: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosionc. Old

1) Very small gradient

2) Only carries finest sediments

3) Can flood

4) Makes Oxbow Lakes

Page 72: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosion

Page 73: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Agents of Erosiond. Old streams can

become young again if the area is uplifted and gradient becomes steeper

e. Most streams have youth at source, mature in middle and old age at their mouth (where river dumps into a lake/ocean)

Page 74: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Weathering, Erosion, & Deposition

part 3

Page 75: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Part 3 - Deposition

A. Sediments are released or dropped from the agent of erosion

Page 76: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Factors Affecting Deposition

A. Size1. Large particles settle the fastest

Settling Time

Particle Size

Tim

e

Particle Size

Rat

e

Settling Rate

Page 77: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Factors Affecting Deposition

B. Shape1. Round particles settle faster than flat

particles

C. Density1. More dense particles settle faster

Page 78: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Sorting of SedimentsA. Graded bedding (vertical sorting)

1. Happens at ocean bottoms or landslides

Page 79: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Sorting of Sediments

B. Horizontal Sorting1. Large particles settle first as a stream

enters a body of water

Page 80: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Glacial Deposits

A. Till1. Dropped from glacier.

2. UNSORTED!!!!! (all sizes mixed)

B. Outwash material1. Deposited from meltwater

2. SORTED

Page 81: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Energy Changes

A. Kinetic Energy – energy of movement

B. Potential Energy – stored energy

C. High velocity = High KE = erosion

D. Low velocity = Low KE = deposition1. Streams slow when:

a. Slope or volume decreases

b. Moves into a body of water

c. On the inside of a curve

Page 82: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Energy Changes

E. Streams have GREATEST PE at their source (highest point)

1. Loses PE as it turns to KE on the way down

Greatest PE, Less KE

Greater KE, Less PE

KE

PE

Page 83: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Erosion – Deposition System

A. Side View (profile)

Erosion Dominates – water moving fast

Delta can form

Source

Mouth

A

B

C

Ocean

Deposition – river slows down

Page 84: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Erosion – Deposition System

B. Top ViewInside of curve, water moves SLOWER, deposition, shallow

Outside of curve, water moves FASTER, erosion, deeper water

OCEAN

A B C

Delta

Page 85: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the
Page 86: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Velocity within a Stream

A. Water moves fastest in the middle towards the top of the stream (less friction)

Stream Cross Section

A

B

CD

D – Water moves fastest, smallest friction

Page 87: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Velocity within a Stream

B. Cross Section of a Stream Corner

Outside = Faster = More Erosion = Deep

Inside = Slower = More Deposition = Shallow

Page 88: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Velocity within a Stream

Page 89: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Effects of Climate on Landscape

A. Humid (wet)1. Worn down and rounded (more

weathering)

B. Arid (dry)1. More angled, sharper edges

Page 90: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Effects of Climate on Landscape

Humid Arid

Page 91: Weathering, Erosion, & Deposition part 1 Part I. Weathering A.Weathering is the physical or chemical break- down of rocks or minerals at or near the

Drainage PatternsA. Arrangement of

streams draining water in an area

B. Determined by type of bedrock


How can wind and water change our landscapes?. A.Weathering- the destructive processes by which materials at or near the Earths surface are changed in

How can wind and water change our landscapes?. A.Weathering- the destructive processes by which materials at or near the Earths surface are changed in

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