Weathering – What is it? Copyright © 2010 Ryan P. Murphy
The breaking of rock into smaller pieces. Copyright © 2010 Ryan P. Murphy
Either mechanical or chemical Copyright © 2010 Ryan P. Murphy
Wind
Water
Mechanical Weathering: Physically breaking rocks into smaller pieces without chemicals. Copyright © 2010 Ryan P. Murphy
Mechanical Weathering Heat Water Ice Pressure Copyright © 2010 Ryan P. Murphy
Mechanical Weathering Heat Water Ice Pressure Copyright © 2010 Ryan P. Murphy
Mechanical Weathering Heat Water Ice Pressure Copyright © 2010 Ryan P. Murphy
Mechanical Weathering Heat Water Ice Pressure Copyright © 2010 Ryan P. Murphy
Mechanical Weathering Heat Water Ice Pressure Copyright © 2010 Ryan P. Murphy
Water It crashes into rocks and causes rocks to hit each other and become smaller and smoother. Copyright © 2010 Ryan P. Murphy
Round Rocks
Round Rocks Mechanical Weathering
What happens if you leave a can of soda in the freezer?
Answer! It will explode because water expands when frozen. Copyright © 2010 Ryan P. Murphy
Copyright © 2010 Ryan P. Murphy
The increase in volume of ice is about 9%. Copyright © 2010 Ryan P. Murphy
The increase in volume of ice is about 9% The increase in volume of ice is about 9%. This increase causes enough force to break most rigid containers. Copyright © 2010 Ryan P. Murphy
The increase in volume of ice is about 9% The increase in volume of ice is about 9%. This increase causes enough force to break most rigid containers. This is the same force, repeated on a daily basis, that creates frost heaves in the roads in the winter. Copyright © 2010 Ryan P. Murphy
Copyright © 2010 Ryan P. Murphy
Copyright © 2010 Ryan P. Murphy
Copyright © 2010 Ryan P. Murphy
Copyright © 2010 Ryan P. Murphy
Ice/Frost Wedging: Water enters cracks in the rocks, freezes, expands and breaks rocks. Copyright © 2010 Ryan P. Murphy
Creates cracks and holds which you can use to rock climb. Copyright © 2010 Ryan P. Murphy
What is this a picture of?
What is this a picture of? Answer: This is a picture of the Old Man of the Mountain in Franconia Notch in the state of New Hampshire.
Draw the profile of the old man of the mountain in your journal. Copyright © 2010 Ryan P. Murphy
Draw the profile of the old man of the mountain in your journal. A victim of weathering and ice wedging. Copyright © 2010 Ryan P. Murphy
Root Wedging: Plant roots enter a crack, grow and expand the crack. Copyright © 2010 Ryan P. Murphy
Root Wedging: Plant roots enter a crack, grow and expand the crack. Copyright © 2010 Ryan P. Murphy
Root Wedging: Plant roots enter a crack, grow and expand the crack. Copyright © 2010 Ryan P. Murphy
Which picture best represent ice wedging, and which picture best represents root wedging? Copyright © 2010 Ryan P. Murphy
Which picture best represent ice wedging, and which picture best represents root wedging? Copyright © 2010 Ryan P. Murphy
Root Wedging A B Copyright © 2010 Ryan P. Murphy
Root Wedging A B Copyright © 2010 Ryan P. Murphy
Root Wedging Ice / Frost Wedging A B Copyright © 2010 Ryan P. Murphy
Animal Activity: Animals mechanically wear away the rock. Copyright © 2010 Ryan P. Murphy
Effects of Animal Activity
Chemical Weathering Chemical weathering-occurs when chemical reactions dissolve the minerals in rocks or changes them into different minerals (rusting, acid breakdown, etc) Chemical Weathering This cave was formed by slightly acidic water dissolving the limestone
Chemical Weathering Natural Bridge Caverns in Texas
EROSION – the process by which natural forces move weathered rock and soil from one place to another. Forces that cause erosion: 1. Gravity 4. Waves 2. Wind 5. Running water 3. Glaciers
Erosion Galveston Texas before/after Hurricane Ike
Glacial Erosion Movement of Glaciers change the land beneath the glacier
Kelleys Island Glacial Grooves
Wind Erosion Shapes the land in areas where there are few plants to hold the soil in place (e.g. Desert)
Landslides Landslides- a geological phenomenon which includes a wide range of ground movement, such as rock falls, deep failure of slopes and shallow debris flows, which can occur in offshore, coastal and onshore environments.
Deposition The process of eroded earth materials (sediments) being deposited in a new location Ex: delta-where sediment is deposited where a river flows into an ocean or lake builds up a landform Ex: sand dune-a deposit of wind blown sand
Deposition Desert winds sculpted these gentle swirls out of the limestone hills in Black Gap Wildlife Management Area, Texas. This remote, 100,000-acre (40,470-hectare) area in West Texas contains some of the lowest, driest, and hottest areas in the Chihuahuan Desert
Deposition Deposition area from the Rio Grande River The Red River carries sediments, and drops some along the way