NUMERIC DATING C. Samples were collected from Granite D and Basalt V from Figure

Question

NUMERIC DATING C. Samples were collected from Granite D and Basalt V from Figure 5.6 and analyzed for Kk°Ar radio- ab and active isotopes. The lab is a little slow and your budget is tight, so you compromise with the l ask them to send just th the ages yourself. Find the K/Ar half-life from table 5.2. The half-life data tells you how many half- lives have elapsed since the rock formed. e half-lives of the samples and you will use the half-life equation to calculate K/Ar Half-Life Age of Sample Rock Unit Half-Lives Elapsed 0.55 Granite D Basalt V 0.25

Explanation / Answer

Youngest

W

V

R

L

D

B

S

M

1fault

K

E

F

Oldest

Befor unit M was deposited

Disconfirmity between E and F

Law of super postion and principle of crosscutting indicate L is younger than D

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