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Question: lab 3 oce3014l age 807060 50 40 30 20 10...

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Lab 3 OCE-3014L Age 807060 50 40 30 20 10 millions of years) South 250 Atlantic the spreading center 1500 1000 500 North 500 Pacific 0 Distance trom the spreading 3000 IIL So 2000 800 Pacific 300 Distance from the spreading 1800 1500 1000 500 Figure 11: Magnetic anomalies (the peaked curves) recorded perpendicular to spreading centers, or ridges, in the major ocean basins reveal a similar sequence of magnetized rocks. The vertical lines passing through the three curves correlate equivalent magnetic anomalies from different ocean basins. Anomalies are plotted in gammas, which is a measure of magnetic field strength. They are spaced differently because the spreading rates are different at each ridge. However, they all show the same sequence of magnetization. 2a. In the above paleomagnetic record of three ocean floors, the right side is the seafloor at the mid-oceanic ridge; the left side is the edge of the seafloor approaching the continental margin. Over the course of 80 million years which seafloor has moved the fastest from the spreading center? sprradiny 2b. Using the Rate Equation what is its spreading rate in centimeters per year? (1 kilometer= 100,000 centimeters) Rate distance+ time cm/yr 2c. In 2b you actually calculated the half-spreading rate for the sea floor, because you calculated the distance from the mid-oceanic ridge. Double your value to get the spreading rate for the entire seafloor cm/yr

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