. The Earth beneath the sea : History. Ocean bottom; Marine geophysics. 818 KOCZY [CHAP. 30 (a) If Ai is much smaller than A2, Nq^ —^ N^ and the equation can be approxi- mated as follows: ir2 = mi^{l-e-'2(), A2 (4) which gives the formula for age as 1 a;'" ' ^2A2 (5) where Nq^ is the initial amount of the decaying nuclide and N^ the nuclide produced. This method is applicable when one of the long-lived nuclides, such as uranium or thorium, is incorporated without daughter products in a mineral.. 0.5 1.0 2.0 2.5 3.0 3.5 4.0 Ag/. Fig. 2. Age determination with the aid of the ratio of two

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. The Earth beneath the sea : History. Ocean bottom; Marine geophysics. 818 KOCZY [CHAP. 30 (a) If Ai is much smaller than A2, Nq^ —^ N^ and the equation can be approxi- mated as follows: ir2 = mi^{l-e-'2(), A2 (4) which gives the formula for age as 1 a;'" ' ^2A2 (5) where Nq^ is the initial amount of the decaying nuclide and N^ the nuclide produced. This method is applicable when one of the long-lived nuclides, such as uranium or thorium, is incorporated without daughter products in a mineral.. 0.5 1.0 2.0 2.5 3.0 3.5 4.0 Ag/. Fig. 2. Age determination with the aid of the ratio of two

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Image ID: RE7YF3

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