contestada

XX XX
x xx
XXX
x
XXXX
Xxxt
Figure A.
8. What type of unconformity is D?
XX
f
+
KK
0. What is the half-life of the isotope in Question 9?
t
X
tr
xxx
t
t
1. Give an indirect numerical age of the rock unit above D.
***
xxx
9. The rock unit below D was dated at 60 million years old. The rock contained 50% parent atoms and 50%
daughter atoms. How many half-lives have passed?
D

XX XX x xx XXX x XXXX Xxxt Figure A 8 What type of unconformity is D XX f KK 0 What is the halflife of the isotope in Question 9 t X tr xxx t t 1 Give an indire class=
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