Lab – Relative and Absolute Dating.docx

                       Each row is 4 pts. 2 ptsEach row is 4 points. pt each1 pt each                           Final questions:

For extra credit of 2 pts each, number the blocks from the oldest layer/event starting at 1 to the youngest event which will be the highest number on the diagram. Describe in detail how this geologic sequence came to be. Include processes and events like folding, faulting, tilting, deposition, instrusions, and unconformities.

 

2 pts each

 
 
 
 
B. In dating geologic materials, age determinations are often cross-checked by using different isotopes from the same sample. Why is this good science?

2 pts

 
C. To which geologic Era can you assign the basal granite (uraninite and zircon samples)?

1 pt

 
D. To which geologic Era can you assign the younger granite intrusion (mica samples)?

1 pt

 
E. To which geologic Era can you assign the volcanic ash bed?

1 pt

 
F. Combining the radiometric ages and the relative age principles you know, construct a sequence of events for the block diagram.

2 pts

 
How are absolute dating and relative dating different?

 

 

 

2 pts

 
In your opinion, is one method better than the other?

 

 

2pts

 
Imagine that you had to tell someone who didn’t know radioactive material decays into daughter atoms. How could you describe this process to them? Include a description of half-life in your answer.

 

4pts

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