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framework grains造句

"framework grains"是什么意思   

例句與造句

  1. Feldspars comprise a considerably lesser portion of framework grains and minerals.
  2. In sandstones, framework grains are often cemented by silica or carbonate.
  3. Matrix may also be present in the interstitial spaces between the framework grains.
  4. On the other hand, telogenesis can also change framework grains to clays, thus reducing porosity.
  5. Under these conditions, framework grains and cement are again subjected to dissolution and in turn increasing porosity.
  6. It's difficult to find framework grains in a sentence. 用framework grains造句挺難的
  7. They only make up about 15 percent of framework grains in sandstones and 5 % of minerals in shales.
  8. Quartz makes up approximately 65 percent of framework grains present in sandstones and about 30 percent of minerals in the average shale.
  9. Many geologists, however, do not agree on how to separate the triangle parts into the single components so that the framework grains can be plotted.
  10. Even though sandstones have very simple compositions which are based on framework grains, geologists have not been able to agree on a specific, right way, to classify sandstones.
  11. For example, in lithic sandstones, cementation is less extensive because pore space between framework grains is filled with a muddy matrix that leaves little space for precipitation to occur.
  12. Classification schemes vary widely, but most geologists have adopted the Dott scheme, which uses the relative abundance of quartz, feldspar, and lithic framework grains and the abundance of muddy matrix between these larger grains.
  13. In addition to setting a boundary for what the matrix is, Dott also breaks up the different types framework grains that can be present in a sandstone into three major categories : quartz, feldspar, and lithic grains.
  14. On each randomly selected point that lands on a sand grain, the operator must determine the make-up of the area chosen, i . e . whether it is a mineral grain that is sand sized ( larger than 62.5 micrometers ) or a finer-grained fragment of another rock type, called a matrix ) grains are counted, or non-framework grains are counted and then excluded from percentages when using descriptive devices such as QFL triangles.

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