Weathering and Soil

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Weathering and Soil

• By Kathleen Schurman
• Ryan Hart
• Nicole Beardsley
• Matt Nocito

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Weathering and Soil

• The different kinds of weathering are
• (chemical) hydrologist, spherical, dissolution,
  oxidation, plant acid/reaction to acid.
• (mechanical) abrasion, exfoliation, frost
  wedging, biological activity.
• Soil is the combination of organic matter with
  particles of weathered minerals

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Abrasion
Acid rain
Biologic activity
Frost wedging
dissolution
oxidation
exfoliation
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Soil Composition

• Soil Composition- varies from region to region
  and is affected by the type of bedrock it derives
  from, and the climate from which it forms in.

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Soil Profile A

• Horizon A- top soil mineral matter mixed with
  some organic matter.

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Soil Profile B

• Horizon B- mostly clay with very little weathered
  parent material.

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Soil Profile C

• Horizon C- partially weathered parent material.

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Parent Material

• Bedrock- it varies from region to region, is the
  last layer of soil (bottom). It will influence
  the development of all the soil above it.

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Soil and Climate

• There are three main types of soil.
• Laterite
• Pedocal
• Pedalfer

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Laterite

• Forms in a hot, wet tropical area. When it
  dries, it becomes water-proof.

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Pedocal

• Forms in a dry, hot climate. It can be found in
  Western United States in areas that have grass
  and brush vegetation. Contains less clay than
  Pedalfer, and it contains large amounts of
  calcite.

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Pedalfer

• It forms in a climate that receives sixty three
  centimeters of rain a year. Can be found in the
  Eastern Part of the United States. Has a red to
  brown color, and contains large amounts of iron,
  aluminum and clay.