ESCI171 - Geologic Time & Plate Tectonics And Introduction To Plate Tectonics - Geology Assignment Help

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Assignment Task -

 

PART 1A: Relative Age Dating

1.a) Use the principles of relative dating to determine the geologic history of the area shown in the diagram.  No rock layers have undergone overturning from tectonic forces. Use the table below for your geological history.

 

PART 1A: Relative Age Dating CONT’D

1. b) Consult the diagram above and note the location of the unconformity labeled X.  From the geologic relationships shown, give two lines of evidence that boundary X is an unconformity. What type of unconformity is boundary X?

 

                                    radioactive decay curve

 

1. c) A paleomagnetic study was conducted on the basalt that makes up unit ‘B’ . The basalt unit is made up of several flows that researchers determined spanned volcanic eruptions over approximately

1.1 million years (based on correlation of similar rocks in another region). The normal and reversed magnetic polarity pattern is given below, and the bottom of the volcanic unit is indicated. Use the magnetic time scale (Fig. 4.29) or otherwise, to determine the time period and epoch of active volcanism that produced the basalt

 

 

 

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