Chapter 7 Notes - Soils

Chapter 7 Notes - Soils - CHAPTER 7 - SOILS What is Soil? -...

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CHAPTER 7 - SOILS What is Soil? - Unconsolidated, forms on land surface - Minerals, organics, gases, and liquids - Original sedimentary layers gone, new horizons form in-place - NO PLANTS NECESSARY Soil Horizons Development of Horizons - Additions o Organic matter, gases, water - Losses o Soluble minerals - Translocations o Downward movement - Transformations o New minerals through weathering “O” Horizon - Not always present - Accumulation of organic debris “A” Horizon - Top (if no “O”) - Abundant organics - Most transformations, dissolution, and downward movement from here “E” Horizon - Not always present - “Washed-out” zone - Only the most stable minerals “B” Horizon - Zone of accumulation - Clays, calcium, carbonates, oxides “C” Horizon - Minimally altered - “Regolith” - Original bedding and structures sometimes visible “R” Horizon - Unaltered bedrock
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Soil Forming Factors - Climate o Temperature, precipitation - Organisms o Plants, animals, fungi, bacteria - Relief o Topography
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This note was uploaded on 02/15/2012 for the course GEOLOGY 460:103 taught by Professor Feigenson during the Fall '10 term at Rutgers.

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Chapter 7 Notes - Soils - CHAPTER 7 - SOILS What is Soil? -...

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