Academic literature on the topic 'Mima mounds'

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Journal articles on the topic "Mima mounds"

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Cox, George W., and Christopher G. Gakahu. "Mima mound microtopography and vegetation pattern in Kenyan savannas." Journal of Tropical Ecology 1, no. 1 (February 1985): 23–36. http://dx.doi.org/10.1017/s0266467400000055.

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ABSTRACTEarth mounds are important determinants of vegetation pattern in savannas, acting as foci for establishment of woody plants. In the Kenya highlands, mounds formerly attributed to termites have recently been found to be Mima mounds produced by rhizomyid mole rats. We investigated Mima mounds on black cotton soils near Kenyatta International Airport and on brown clay soils between Nairobi and Thika. At Kenyatta Airport, mounds had loamier, more granular soils than intermounds, and contained small rocks that mole rats can move. At the site between Nairobi and Thika, mound soils were more friable, higher in pH, and lower in carbon than intermound soils. Data from this and other studies indicate that Mima mound soils are more favourable for plant growth than those of true termite mounds. Mound vegetation exhibited lower coverage of grasses and greater coverage by forbs, shrubs, and bare ground, a pattern indicative of intense grazing and soil disturbance. Acacias, absent from most mounds, were abundant in the zone bordering the mound. This pattern may reflect the favourability of mound soils, combined with the effects of high grazing pressure. Future studies of savanna vegetation should distinguish between termite mounds and Mima mounds.
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Nelson, Robert E. "Implications of Subfossil Coleoptera for the Evolution of the Mima Mounds of Southwestern Puget Lowland, Washington." Quaternary Research 47, no. 3 (May 1997): 356–58. http://dx.doi.org/10.1006/qres.1997.1891.

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The origin of Washington State's Mima Mounds has been debated for over a century, with numerous mechanisms being postulated. Subfossil Coleopteran (beetle) remains recovered from the base of a mound at Mima Prairie consist of species that would be expected in rodent burrows and nests; all but one species are obligate burrow inhabitants. These results suggest the past presence of fossorial rodents (probably pocket gophers,Thomomys mazama) in the mounds, although none live there at present. Whether or not the gophers created the mounds, they may well have been instrumental in maintaining mound geometry until very recently.
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Cox, G. W., and V. G. Roig. "Argentinian Mima Mounds Occupied by Ctenomyid Rodents." Journal of Mammalogy 67, no. 2 (May 15, 1986): 428–32. http://dx.doi.org/10.2307/1380907.

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Berg, Andrew W. "Formation of Mima mounds: A seismic hypothesis." Geology 18, no. 3 (1990): 281. http://dx.doi.org/10.1130/0091-7613(1990)018<0281:fommas>2.3.co;2.

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MARTIN, G. H. G. "Mima mounds in Kenya–a case of mistaken identity." African Journal of Ecology 26, no. 2 (June 1988): 127–33. http://dx.doi.org/10.1111/j.1365-2028.1988.tb00963.x.

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Gabet, Emmanuel J., J. Taylor Perron, and Donald L. Johnson. "Biotic origin for Mima mounds supported by numerical modeling." Geomorphology 206 (February 2014): 58–66. http://dx.doi.org/10.1016/j.geomorph.2013.09.018.

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Cox, G. W., and J. Hunt. "Form of Mima Mounds in Relation to Occupancy by Pocket Gophers." Journal of Mammalogy 71, no. 1 (February 20, 1990): 90–94. http://dx.doi.org/10.2307/1381323.

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Cox, G. W., and Andrew W. Berg. "Comment and Reply on "Formation of Mima mounds: A seismic hypothesis"." Geology 18, no. 12 (1990): 1259. http://dx.doi.org/10.1130/0091-7613(1990)018<1259:carofo>2.3.co;2.

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Saucier, Roger T., and Andrew W. Berg. "Comment and Reply on "Formation of Mima mounds: A seismic hypothesis"." Geology 19, no. 3 (1991): 284. http://dx.doi.org/10.1130/0091-7613(1991)019<0284:carofo>2.3.co;2.

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Reider, Richard G., Joseph M. Huss, and Timothy W. Miller. "A groundwater vortex hypothesis for mima-like mounds, Laramie Basin, Wyoming." Geomorphology 16, no. 4 (August 1996): 295–317. http://dx.doi.org/10.1016/0169-555x(95)00142-r.

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Dissertations / Theses on the topic "Mima mounds"

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Marchal, Karen L. "Geochemistry, Mineralogy and Evolution of Mica and Feldspar from within the Mount Mica Pegmatite, Maine, USA." ScholarWorks@UNO, 2014. http://scholarworks.uno.edu/td/1822.

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Mount Mica is a poorly zoned sodic LCT-type pegmatite consisting dominantly of quartz, albite and muscovite in the outer portions. Potassium feldspar and lepidolite are restricted to the core zone. Micas in the wall zone are chemically homogeneous, but abruptly evolve into higher Cs + Rb bearing lithian muscovites and lepidolites in the core zone. The abrupt increase of the Cs, Rb in K-feldspar, and Cs, Rb and F in muscovite, and lepidolite combined with the occurrence of highly evolved species lepidolite, pollucite, elbaite, beryl and spodumene in the core zone suggests that incompatible elements were retained in residual fluid until their concentration was high enough to initiate crystallization of incompatible-rich mineral phases. The relatively low abundance of incompatible elements in the hanging wall suggest that the fractionation process was efficient in sweeping incompatibles into the core-zone, producing proportionally small volumes inside the pegmatite with very high enrichment in incompatible elements.
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Frashuer, Anya C. "Middle Woodland Mound Distribution and Ceremonialism in the Apalachicola Valley, Northwest Florida." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001504.

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Kaldas, Mina M. S. [Verfasser]. "Improvement of Semi-Active Suspensions through Fuzzy-Logic and Top Mount Optimization / Mina M.S. Kaldas." Aachen : Shaker, 2015. http://d-nb.info/1071527762/34.

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Kelly, Jennifer Christine. "The fluid evolution of the Mount Mica and Irish Pit pegmatites, Maine| Evidence from stable isotopes." California State University, Long Beach, 2013.

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Klein, Janet L. "Vegetation patterning relative to Mima-like mounds and its implications for a tallgrass prairie restoration in southerwestern Missouri." 1998. http://catalog.hathitrust.org/api/volumes/oclc/41887134.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1998.
Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 162-167).
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Robinson, Chance. "Spatial Trends and Factors of Pimple Mound Formation in East-Central Texas." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10997.

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Pimple mounds are circular to elliptical domes with basal diameters ranging from 3 to more than 30 m, and heights of 30 cm to more than 2 m above intermound levels. For almost two centuries, the origin of these features has been speculated upon by scientists without general consensus as to one of over 30 different mechanisms suggested for their origin. These soil microfeatures can be observed throughout portions of East Texas as well as Louisiana, Arkansas, Oklahoma, and Missouri. Pimple mounds have been extensively mapped throughout East Texas as complexes covering over 1.0 million ha in 47 soil survey areas. About 600,000 ha are on Pleistocene-age geological formations. This study focused on 5,500 ha in Leon County, Texas, mapped as Rader-Derly complex and Derly-Rader complex. Rader (Aquic Paleustalfs) is on mounds and Derly (Typic Glossaqualfs) in the low intermounds. These soils are mapped primarily on terraces of the Trinity River system within the survey area. Using elevation levels published for the various fluviatile terrace deposits of the Trinity River, six groups (five terrace level groups and an upland group) were identified for analysis of mounds within the study area. Processes and factors of soil formation during the life of these features were considered using two methods ? remotely sensed elevation data and sampling data collected in the field. Size, shape, and relief of mounds were analyzed using airborne-based, remotely sensed LiDAR (Light Detection and Ranging) elevation data. Particle size distributions and pedon descriptions of mounds formed on materials of various ages were compared across the study area with special emphasis given to spatial trends. Analyses indicate a fluvial origin with pimple mound orientation corresponding to surrounding ridge and swale features of the paleoriver. Pimple mounds within the study area formed in the presence of sandy to loamy alluvial sediments and require the presence of accretionary ridge microtopography over point bar deposits. This alluvial parent material and topography were further developed by fluctuations in climate and vegetation over time. The erosional influence of bioturbation by animals and the intense rainfall and flood events which frequent the study area provided an environment in which these soil microfeatures have developed and over time exhibit increased levels of pedogenesis.
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Books on the topic "Mima mounds"

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L, Washburn A. Mima mounds: An evaluation of proposed origins with special reference to the Puget lowlands. [Olympia, Wash.]: Washington State Dept. of Natural Resources, Division of Geology and Earth Resources, 1988.

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Carolina bays, Mima mounds, submarine canyons and other topographical phenomena: A catalog of geological anomalies. Glen Arm, Md: Sourcebook Project, 1988.

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Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/9780813724904.

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Horwath, Jennifer L., and Donald L. Johnson. Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/spe490.

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Mima Mounds: The Case for Polygenesis and Bioturbation (Geological Society of America Special Paper). Geological Society of Amer, 2012.

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Book chapters on the topic "Mima mounds"

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Johnson, D. L. "Appendices C-F. Mima mound literature and references." In Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/2012.2490(a3).

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Johnson, Donald L., and Diana N. Johnson. "The polygenetic origin of prairie mounds in northeastern California." In Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/2012.2490(06).

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Johnson, Donald L., and Jennifer L. Horwath Burnham. "Introduction: Overview of concepts, definitions, and principles of soil mound studies." In Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/2012.2490(00).

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Reed, Sarah, and Ronald Amundson. "Using LIDAR to model Mima mound evolution and regional energy balances in the Great Central Valley, California." In Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/2012.2490(01).

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Irvine, L. Lee-Ann, and Janis E. Dale. "“Pimple” mound microrelief in southern Saskatchewan, Canada." In Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/2012.2490(02).

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Cox, George W. "Alpine and montane Mima mounds of the western United States." In Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/2012.2490(03).

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Horwath Burnham, Jennifer L., Donald L. Johnson, and Diana N. Johnson. "The biodynamic significance of double stone layers in Mima mounds." In Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/2012.2490(04).

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Finney, Fred A. "The forgotten natural prairie mounds of the Upper Midwest: Their abundance, distribution, origin, and archaeological implications." In Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/2012.2490(05).

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Johnson, D. L. "Foreword to Appendix A." In Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/2012.2490(07).

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Fryxell, Roald H. "Appendix A. The Late Wisconsin age of mounds on the Columbia Plateau of eastern Washington." In Mima Mounds: The Case for Polygenesis and Bioturbation. Geological Society of America, 2012. http://dx.doi.org/10.1130/2012.2490(08).

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Conference papers on the topic "Mima mounds"

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Sletten, Ronald S., John O. Stone, and Bernard Hallet. "CONSTRAINING MATERIAL PROPERTIES AND AGE OF MIMA MOUNDS." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-308430.

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Pope, Isaac. "ELONGATE MOUNDS: EVIDENCE FOR HYDRODYNAMIC INFLUENCE ON ORIGIN OF PUGET LOWLAND MIMA MOUNDS." In Cordilleran Section-117th Annual Meeting-2021. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021cd-363161.

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Pope, Isaac. "COBBLES, BOULDERS, AND GRAVEL PEDESTALS AMONG MIMA MOUNDS AT MIMA AND ROCKY PRAIRIES, PUGET LOWLAND: IMPLICATIONS FOR MOUND FORMATION." In Southeastern Section-70th Annual Meeting-2021. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021se-362373.

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Wilkins, Susan. "THE MIMA MOUNDS OF SOUTHWEST WASHINGTON AND OTHER MOUNDS LOCATED AROUND THE STATE WERE THE RESULT OF FREQUENT MELT WATER INUNDATIONS OF FORESTS ALONG THE MAJOR GLACIAL DRAINAGE CHANNELS DURING THE LAST ICE AGE." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-308726.

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Goldstein, Barry, and Patrick Pringle. "THE TANWAX-OHOP VALLEY FLOOD AND DEBRIS FLOW, AN ICE AGE FLOOD FROM THE CASCADE RANGE INTO THE SOUTHERN PUGET LOWLAND AND LIKELY SOURCE OF SEDIMENTS FOR THE MIMA MOUNDS." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-358056.

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Shehan, Joshua W., Paris T. McGee, James C. Carson, and Ryan S. Adams. "Dual band, dual polarized, rail mount MIMO stadium antenna." In 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2017. http://dx.doi.org/10.1109/apusncursinrsm.2017.8072976.

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Royer, Alexandre, Jean-Claude Gelin, and Thierry Barrière. "Study of the Degradation of Polyethylene Glycol in Inconel 718 Feedstock During Powder Injection Moulding Process." In ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9414.

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Metal injection moulding (MIM) has over the past decade established itself as a competitive manufacturing process to produce in large quantities small precision components with complex shape which would be costly to produce by alternative methods (Enneti, 2012). MIM is a process which combines the versatility of plastic injection moulding with the strength and integrity of machined, pressed or otherwise manufactured small, complex metal parts. MIM consist in shaping powder particles in injection process and then sintering them. MIM make use of the plastic moulding concepts to shape powder-polymer feedstock into the required geometry. During the injection phase, segregation appears in the feedstock and defects will be appear in the component during the sintering. To limit this effect a vast variety of binder systems have been developed (Enneti, 2012) to improve the homogeneity of feedstocks and limit segregation. Binder is formulated as a mixture of different organic or inorganic substances with several functions. Binder has the main commitments of giving the necessary rheological behavior to the feedstocks for injection moulding to transport the powder particles into the mould cavity and the cohesion of the green part (Enneti, 2012). The goal of this study is to characterize and understand the chemical behavior of feedstocks during the phases of mixing and injection. First the binder was studied. Then based on these results the characterization of the feedstock was made. For this a study of the chemical behavior and interactions on feedstocks based on polyethylene glycol (PEG) and Inconel 718 powder was investigated by Fourier Transform InfraRed spectroscopy (FTIR) (Hidalgo et al., 2013). That methodology was also investigated to study the thermal behavior of the binder at a temperature close to the temperature of mixing and injection. Analyzes shows the thermal degradation of the PEG is not affect by the components of the feedstocks. No chemical interactions between the powder and the binder are revealed. The thermal degradation of the PEG appears during the mixing process and change the rheological behavior of the binder. This result shows the necessity to develop another formulation of binder to preserve the PEG.
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Simmons, Williams, Alexander Falster, Karen Webber, Myles Felch, and Dwight Bradley. "Lithium-Boron-Beryllium Gem Pegmatites, Oxford Co., Maine: Havey and Mount Mica Pegmatites." In New England Intercollegiate Geological Conference. Bates College, 2017. http://dx.doi.org/10.26780/2017.001.0002.

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de Mello, Jose´ Daniel B., Cristiano Binder, Aloisio Nelmo Klein, and Roberto Binder. "Effect of Sintering Temperature on the Tribological Behavior of Plasma Assisted Debinded and Sintered MIM Self Lubricating Steels." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24245.

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Solid lubrication and solid lubricants are one of the most promising choices for controlling friction and wear in energy efficient modern systems. The production of self lubrication composites containing second phase particles incorporated into the volume of the material appears to be a promising solution. A new processing route to obtaining a homogeneous dispersion of discrete solid lubricant particles in the volume of sintered steels produced by metal injection molding (MIM) was recently presented. This new route was achieved by in situ formation of graphite nodules due to the dissociation of precursor (SiC particles) mixed with the metallic matrix powders during the feedstock preparation. Nodules of graphite (size ≤ 20μm) presenting a nanostructured stacking of graphite foils a few nanometers thick were obtained. The thermal debinding, as well as the sintering, was performed in a single thermal cycle using a Plasma Assisted Debinding and Sintering (PADS) process. In this work, we present and discuss the effect of sintering temperature on the tribolayer durability and average friction coefficient in the lubricious regime (μ&lt;0.2) of plasma assisted debinded and sintered self lubricating steel produced by metal injection mould technique. Three different temperatures (1100, 1150 and 1200 °C) and six different SiC contents (0–5%) were analyzed. Friction coefficient was little affected by the sintering temperature. However, the durability of the tribo layer formed on the sliding interface was greatly increased (5X) for the lower sintering temperature (1100°C).
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Tryggvason, Bjarni, William Stewart, Jean d, and Lawrence Vezina. "Acceleration levels and operation of the Microgravity Vibration Isolation Mount (MIM) on the shuttle and the Mir space station." In 37th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-578.

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