ESS 210 Week One Notes
ESS 210 Week One Notes ESS 210 001
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This 2 page Class Notes was uploaded by Michaela Humby on Thursday January 7, 2016. The Class Notes belongs to ESS 210 001 at University of Tennessee - Knoxville taught by Andrew Conrad Sherfy (P) in Fall 2015. Since its upload, it has received 37 views. For similar materials see Intro to Soil Science in Environmental Science at University of Tennessee - Knoxville.
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Date Created: 01/07/16
ESS 210 Week One Notes What is soil? Where all the atmosphere meets all of the rocks (lithosphere), water and living things. What is soil made of? Minerals (weathered pieces of rock) about 45% Organic matter (5%) Pore space (about 50%) What does soil do? Provide and promote growth of higher plants Engineering medium Principle factor in fate of hydrologic cycle Serves as natures recycling system Home to tremendous biodiversity Certain soils are better at some things than others Five Soil Forming Factors 1. Transport Parent Materials a. Colluvial-‐ colluvium-‐ transported by gravity i. Poorly sorted fragments of various sizes, rocky ii. Small geographical area, like bottom of hill slopes iii. Disorganization with rocks and features b. Alluvial Deposits-‐alluvium-‐ transported by water (rivers) i. Flood plains ii. During flooding, water spreads and slows, sediments are drop iii. Terraces are old flood plains above the current flood plain c. Alluvial fans (from fast moving streams) i. Tend to be coarse and rocky ii. Usually gravelly or stony in mountainous regions iii. Stream leaves narrow channel and descends to broad valley below d. Delta Deposits i. Rivers carry clay/fine silt to lakes or oceans ii. Very slow water = deposition iii. Very clayey and swampy e. Marine-‐ by water (oceans) coastal plains i. Ocean sediments build up over time ii. Materials are gravely, sandy, clayey depending on area f. Lacustrine-‐ transported by water (lakes) i. Clayey soils formed in old lake beds ii. Major areas of lacustrine soils in glaciated areas g. Glacial Till and Outwash (ice and meltwater) i. All glaciers advances, grinds up rocks and carries ii. As glacial till is unsorted, unconsolidated material iii. Deposited as glacier melts and recedes iv. Till deposits called moraines v. As glaciers melt, glacial rivers and streams form glacial outwash and sorted deposits h. Eolian-‐ wind ESS 210 Week One Notes i. Loess deposits ii. Wind blown material (most silt) from glaciated areas iii. Cover other soils and parent materials iv. West 1.3 of Tennessee (thick at the Mississippi and TN Rivers) 2. Topography – different topography yield different soils 3. Biota-‐ all living things; chemical weathering 4. Climate-‐ temperature and precipitation 5. Times-‐ varies depending on conditions’ 100-‐500 years for 1 inch of soil 16,000 types of soil
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