Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
fragipan .
Etymologies
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Examples
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Zanini E. and Ugolini F.C. (2004) Segregated ice and liquefaction effects on compaction of fragipans.
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Some upland areas are underlain by plinthite, and sideslopes tend to have fragipans that perch water and cause lateral flow and seepage.
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Its lower crestal elevations, Alfisol soils, limestone bedrock, and sinkholes distinguish it from Ecoregion 70d; its ruggedness, lack of fragipans, and, often, natural vegetation differentiate it from the glaciated plains of Ecoregion 55d.
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It is characterized by poorly drained terrain caused by low relief, clayey substrate, and fragipans.
Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA) 2008
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The Pre-Wisconsinan Drift Plains ecoregion is differentiated from the surrounding ecoregions by its deeply-leached, acidic, pre-Wisconsinan till and thin loess; widespread areas of nearly flat, very poorly-drained soils with fragipans are also distinctive.
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Impervious fragipans or claypans are common and characteristic.
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Leached and stony, they commonly have fragipans and poor drainage.
Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA) 2008
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Soils in Ecoregion 71m were largely derived from loess or residuum (Natural Resources Conservation Service, various dates); they are not very productive because they have been leached of nutrients through time, lack organic material, typically are steeply sloping, and often contain fragipans that impede internal drainage and discourage root penetration (Nelson, 1978, p. 105; Schwegman, 1973, p. 27).
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Most soils have fragipans and are poorly drained; they are typically rocky at the surface, low in carbonate, and not especially fertile.
Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA) 2008
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Prior to the 19th century, flatter areas with slowly to very slowly permeable soils (often containing fragipans) supported Arkansas’ largest prairie.
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