Description
Hi this is fundamental geology lab and I need help with it, it doesn't take much time. Attachment below.
Unformatted Attachment Preview
Purchase answer to see full attachment
Explanation & Answer
Please find the attached solution.
GEOL 104 Lab #8 Absolute Dating
1. Zircons collected from a granite outcrop were assayed and found to contain 25% Uranium and
75% lead. Given a half-life of 50 million years, how old is the rock?
% Uranium
% Lead
100
50
25
0
50
75
No. of half-lives
passed
0
1
2
Age
0
50 million
100 million
The age of the rock is100,000 million
2. A rock sample was determined by your laboratory to be 80 million years old. Given a half-life
of 20 million years, how much daughter element was present?
Half-lives passed= 80/20 =4
No. of half-life
0
1
2
3
4
Parent atom
...