有一次我考试失败,1/4的解释什么是astrochronology点是一个问题。我不了解,真的我没有学习很多,所以我没有叙述一个广泛的关于太阳系的电影和陨石。当我回到家时,我读到:“Astrochronology沉积单元的约会是通过与天文调谐时间尺度上的校准>,如Milankovic周期,[1][2]>,甚至太阳黑子周期。在音乐会和同位素年龄测定,使用时>解决时间表可以高度的准确性。>如果轨道进动周期确定,测量误差可以>低至21000年。”> > source: [wikipedia][1] I got a bit angry and wrote on the students facebook profile: "What is astrochronology? A bunch of shit". I am someone that would challenge a physicist saying geology is not exact to construct a one meter stick, to argue him physics is neither exact as the stick does not measure the same than the Bristish Museum's one at subatomic level. But this time I still think, maybe because I have done all my field geology at folded units, it looks realy complicated to measure the tilt of the rotation axis of the earth from a sedimentary rock. So the question is: > **Is really this method used and has a good reputation among field** > **geologists?** [1]: https://en.wikipedia.org/wiki/Astrochronology
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