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Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Describe the geologic history of the cross-section shown below. Note that the Precambrian basement (Unit A) has been dated by the U-­‐Pb technique as having an age of 2.75±0.1billiong years The igneous intrusion (Unit F) has been dated by the Rb-­‐Sr isotope techniques having a Cretaceous age of 73± 2 million years. Unit 2 E is a fossiliferous limestone containing the index fossil mucrospirifer mucronatus (refer to Figure 4 of pre-­‐lab reading materials). Unit D contains no fossils, but contains inclusions of the Precambrian basement, Unit A. Don’t forget to note any unconformities that may be present and what type they are. Include faulting and folding events. List the events from the oldest to the youngest on the lines below. ***Note there is no way to tell if F or E is older, please select F as younger
E B
Transcribed Image Text:E B
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