定年法 - 地球科學討論
By Barb Cronin
at 2011-07-02T20:44
at 2011-07-02T20:44
Table of Contents
97桃縣國中
31.下列何種定年法最適用約一億年前形成之岩層?
(a)碳14法
(b)銣鍶法
(c)核飛跡法
(d)氧同位素法
答案:b
(a)和(b)的半衰期為五千和四十七億年,
請問cd選項為什麼不能選?
謝謝
--
31.下列何種定年法最適用約一億年前形成之岩層?
(a)碳14法
(b)銣鍶法
(c)核飛跡法
(d)氧同位素法
答案:b
(a)和(b)的半衰期為五千和四十七億年,
請問cd選項為什麼不能選?
謝謝
--
Tags:
地球科學
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