Richmond's Weathering
description
Transcript of Richmond's Weathering
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A GIS Lesson
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What is Weathering?
The process of rocks or other substances breaking down at or near the Earth’s surface is called weathering.
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Not to be confused with…
…Erosion or Deposition.
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Types of Weathering.
• Chemical Weathering
• Mechanical Weathering
• Biological Weathering
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Mechanical Weathering.Mechanical weathering is the physical break down of a material without altering its chemical composition
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Agents of Mechanical Weathering.
Abrasion
Exfoliation
Frost Action
Organic Activity
Gravity
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Chemical Weathering.Chemical Weathering is the alteration of the chemical composition of a material in breaking it down
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Agents of Chemical Weathering.
Carbonation
Oxidation
Acid Rain
Plant Acid
Hydrolysis
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Weathering treasures…
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Rates of Weathering.
1
2
43
1. Tropical rainforest 2. Hot desert
3. Temperate mountains 4. Polar Regions
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Rates of Weathering.
Austin, Texas
Annual Temperature: 20.3oC
Annual Rainfall: 82.4cm
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What kind of Weathering does the Richmond area see?
take a virtual field trip and see for yourself.
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To visualize the images we will use a GIS software application called ArcIMS.
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ArcIMS can take lots of data and images…
…and tie it to a map.
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These maps are georeferenced…
…so you can layer them.
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http://mathsciencecenter.infoGo to this website:
Click on ‘Lessons on the Web’
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Click on ‘GIS on the Web’
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Click on ‘Applications’ and then click on your lesson.
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Open ArcIMS up by clicking the
title.
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Once opened you should see this screen in your browser.
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Use the worksheet to complete the virtual tour.