3. Please order from youngest to oldest, each each labeled rock package or geolo
ID: 293366 • Letter: 3
Question
3. Please order from youngest to oldest, each each labeled rock package or geologic feature in the photograph below. Granite Dike Fault Cracks Youngest _ Oldest Assume now, that radiometric dating (the K-Ar method) is used to date the granite and dike, and the values obtained for the 40Ar/4°K ratio are listed below. Use the included plot of ratio vs. time to answer the following questions. Granite Ratio: 0.0048 0.00 Dike Ratio: 0.0009 0.00 4C What is the age of the Granite? 90.00 0.00 0 20.00 What is the age of the dike? What is the oldest age you can assign to the fault, 00 based on the ages you determined above? 0 10 20 30 40 50 60 70 80 90 100 time, myExplanation / Answer
Yongest to oldest is
1.Cracks 2. Dike 3. Fault 4. Granite
Granite Ar/K ratio is 0.0048
Dike Ar/K ratio is 0.0009
Based on Ar/K ratio Granite is oldest and Dike is Youngest.
The oldest age i can assign to the fault is around 60 my.
The age of the Granite is 80my.
The age of the Dike is 16my