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alluvial    音标拼音: [,æl'uviəl]
a. 冲积的

冲积的

alluvial
adj 1: of or relating to alluvium


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  • What is the difference between eluvium and alluvium?
    Alluvial deposits are mixed with other deposits and are washed downstream in rivers or transported in among other sediments with water as its medium An example is that gold deposits this way are smoothed and are ground down the further from the source
  • What are the differences between alluvial, eluvial and colluvial . . .
    Alluvial: Detrital material which is transported by a river and usually deposited along the river's pathway, either in the riverbed itself or on its floodplain Colluvial: Weathered material transported by gravity action such as on scree slopes Eluvial: Weathered material still at or near its point of formation
  • geology - How are Quaternary alluvial deposits differentiated in . . .
    Qyf Alluvial fan deposits (Holocene)—Unconsolidated, heterogeneous layers of sand, silt, and gravel; relatively undissected; deposited by streams emanating from canyons onto alluvial plains; identified primarily by fan morphology and topographic expression Internal contacts delineate individual alluvial fans
  • Causes of high calcium levels in sandy alluvial soils
    My situation: I've found relatively high levels (1200-2000 ppm) of soil calcium (measured by Mehlich III extraction; Mehlich 1984) from fairly non-acidic (pH = 5 5-6 5) alluvial sandy soils the soil type: "Cartecay and Chewacla soils, 0 to 2 percent slopes, frequently flooded" (with perhaps mix of "White Store sandy loam, 10 to 25 percent slopes")
  • How much does the weight of urban structures (buildings) affect the . . .
    I live in Van, Turkey Van City is situated on an alluvial plain beside Lake Van General geological structure of the area can be seen on pages 43-44 in this conference book One of the images is below According to the article in the link, sediment layers has a slope of 15-30 degrees toward the lake
  • Mapping and calculating morphometric variables for Alluvial Fans in ArcMap?
    I need to calculate various variables for Alluvial Fans in ArcMap such as Fan area, gradient, angle subtended by fan The data I am using is SRTM 1 Arc-Second Global I am attempting to map and measure fans for the first time in ArcMap and would like to understand the way in which I can go about doing this
  • Have meteorites been found in the oldest sedimentary rocks?
    Yes, meteorites have been found in limestone See e g the following references: Geochemistry of meteorite-rich marine limestone strata and fossil meteorites from the lower Ordovician at Kinnekulle, Sweden:
  • sedimentology - Why is the delta part of Jezero crater higher than the . . .
    $\begingroup$ Even if not an actual delta (that is, deposited under water), alluvial fans in fairly dry regions have a similar geometry That is, most of the material is transported by fairly infrequent "flash flood" events, rather than by continual erosion transport $\endgroup$
  • What, exactly, is angle of repose, and where is it in this image?
    Clearly, the alluvial fan has a very shallow angle to it, not to mention the much steeper alluvial fans to the left However, an intermittent stream has cut erosional channels through it and exposed a much steeper "angle of repose", which, is likely more reflective of the true angle of repose for this material
  • Identifying sedimentary rocks in hand specimen
    I'm currently learning how to identify rocks in hand specimen The initial classification into igneous, metamorphic, and sedimentary is mostly ok, but I'm having a problem with further identifying





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