3. Please order from youngest to oldest, each each labeled rock package or geolo

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, my

Explanation / 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

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