Struggling with Geology Questions? Get Help Here!

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Studying volcanic rocks in a sedimentary succession with oil can provide insights into the geological history and processes that led to oil formation. Understanding the granite intrusion is crucial as it helps determine the relative ages of the sedimentary rocks and the granite itself, which can inform about the geological timeline. Analyzing the radioactive minerals in granite can help establish its age, aiding in the understanding of the sedimentary rock's deposition. The discussion also touches on the importance of relating local rocks to geological events to better grasp the area's geological history. Overall, these inquiries highlight the interconnectedness of geological formations and their significance in petroleum geology.
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Homework Statement


My geology profesor gave us 50 questions to practice and check our progress. I have manged to answer all of them but two:

Why would you study a volcanic rock in a sedimentary succession where oil is found?

You work in an area where your sedimentary rock is host to petroleum but the age of deposition of the sediment is unknown. A granite intrudes this rock. Why study the granite?

I really don't know how to answer these two.

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The Attempt at a Solution


I have no clue -- can't find anything related to this in my textbook.
 
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Hi, I know the approximate answer on your second question: the sedimentary rock had been deposited before granite has intruded the rock. So by studying the radioactive minerals of granite we can determine the approximate age of granite. And our sedimentary rock is a bit older, we could even say the same age.
Do you have an answer for following question? : to which geological event relate the rocks in our city?
 
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