chondrule उदाहरण वाक्य
उदाहरण वाक्य
- These particles, or chondrules, are composed mostly of silicate minerals that appear to have been melted while they were free-floating objects in space.
- It seems likely that these chondrules cooled more slowly than those with radial or barred textures, however they still may have solidified in a matter of hours.
- Most chondrites contain both Type I and Type II chondrules mixed together, including those with both porphyritic and nonporphyritic textures, although there are exceptions to this.
- The tiny mass of asteroids may be partly due to inefficient chondrule formation beyond 2 AU, or less-efficient delivery of chondrules from near the protostar.
- The tiny mass of asteroids may be partly due to inefficient chondrule formation beyond 2 AU, or less-efficient delivery of chondrules from near the protostar.
- LL3, LL5, LL6 . ( Types range from 3 to 7 ) The number indicates the amount of alteration suffered by the chondrules in the meteorite.
- Less common types of chondrules may be dominantly composed of feldspathic material ( again either glassy or crystalline ), silica, or metallic Fe-Ni and sulfides.
- About 8 % of the meteorites that fall on Earth are achondrites ( meaning they do not contain chondrules ), some of which are similar to terrestrial igneous rocks.
- Other observed textural features that are clearly the result of very rapid cooling are dendritic and hopper-shaped olivine grains, and chondrules that are composed entirely of glass.
- An LL3 type is pristine with perfectly discernible chondrules, an LL7 type has been melted or altered by pressure or other force to almost completely obliterate the round chondrules.