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1 Glacial Landforms
2 NDWRCDP Disclaimer This work was supported by the National Decentralized Water Resources Capacity Development Project (NDWRCDP) with funding provided by the U.S. Environmental Protection Agency through a Cooperative Agreement (EPA No. CR ) 0) with Washington University in St. Louis. These materials have not been reviewed by the U.S. Environmental Protection Agency. These materials have been reviewed by representatives of the NDWRCDP. The contents of these materials do not necessarily reflect the views and policies of the NDWRCDP, Washington University, or the U.S. Environmental Protection Agency, nor does the mention of trade names or commercial products constitute their endorsement or recommendation for use.
3 CIDWT/University Disclaimer These materials are the collective effort of individuals from academic, regulatory, and private sectors of the onsite/decentralized wastewater industry. These materials have been peer-reviewed reviewed and represent the current state of knowledge/science in this field. They were developed through a series of writing and review meetings with the goal of formulating a consensus on the materials presented. These materials do not necessarily reflect the views and policies of North Carolina State University, and/or the Consortium of Institutes for Decentralized Wastewater Treatment (CIDWT). The mention of trade names or commercial products does not constitute an endorsement or recommendation for use from these individuals or entities, nor does it constitute criticism for similar ones not mentioned.
4 Citation Stolt, M., D.L. Lindbo, R. Miles, and D. Mokma Glacial Landforms Power Point Presentation. in (D.L. Lindbo and N. E. Deal eds.) Model Decentralized Wastewater Practitioner Curriculum. National Decentralized Water Resources Capacity Development Project. North Carolina State University, Raleigh, NC.
5 Glacial Landforms and Deposits Textures and properties vary depending on deposit Till dense, low permeability Outwash sandy, high permeability Lacustrine fine textured, low permeability Properties directly related to suitability for decentralized wastewater use
6 Overview Ice Deposited Till Drumlin Morraine Proglacial Outwash Plain Lacustrine Ice Contact Esker Kame Kame Terrace Kettle Hole
7 Till Unsorted, unstratified materials deposited directly from glacial ice. Generally, dense and low permeability
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12 Drumlin: Cigar-shaped landform with the long axis parallel to the direction of the ice flow. Primarily composed of compacted, unsorted materials churned at the base of the glacier (basal till). May contain looser unstratified materials (ablation till) above the dense till.
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16 Recessional End Morraine: Landform built during the retreat of the glacier. Usually a series of ridges composed of glaciofluvial materials and till.
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18 Terminal End Morraine: Landform built during the retreat of the glacier. Occurs at the furthest extent of the glacial lobe. Usually a complex series of ridges composed of glaciofluvial materials and till.
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21 Ground Morraine: Low-lying landform with some undulation formed of ablation and basal till.
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23 Esker: Long, narrow sinuous steep-sided sided ridge composed of irregularly stratified sand and gravel that was deposited by a subsurface stream under the glacier (tunnel). Commonly range in length from ¼ - 10 s of miles. Range from 10 to 75 ft in height.
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25 Kame: A mound-like hill of stratified sand and gravel formed from collapse of glaciofluvial sediments after the melting of stagnant ice.
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28 Kame Terrace: Terrace like feature consisting of stratified sand and gravel deposited by a stream flowing between the valley wall and the glacier.
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32 Kettle Holes: Circular depressions formed from the burial of isolated blocks of ice and subsequent melting of the ice. Kettle holes often are filled with water making small regularly shaped ponds.
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35 Outwash Plain: Commonly smooth landform of low relief in a valley floor composed of coarse-textured glaciofluvial deposit.
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40 Lacustrine Plain: Commonly a smooth plain with low relief, may be strongly undulating if cover upland landforms. Composed of fine to medium textured sediments deposited in glacial lakes.
41 1 ft
42 Dune Although not specifically a glacial feature, dunes wind deposited and sculpted ridges - often occur pro-glacial, on outwash plains and associated glacial lakes
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44 Glacial Delta Outwash deposits from melt water streams in glacial lakes. Often coarse textured, well graded, bedded and sorted
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49 Glacial Landforms Highly variable in shape and size Ubiquitous across the northern, glaciated regions of North America The type of landform can be easily related to properties of importance to septic systems
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