1) What is the average speed at which BNA drifted away from the ridge at A during the past 67.7 Myr expressed in mm/yr? Show your work. mm/yr What is the average speed that BAF drifted from A? mm/yr Which plate moved faster relative to the ridge over the past 67.7 Myr, if either?
1)
What is the average speed at which BNA drifted away from the ridge at A during the past 67.7 Myr expressed in mm/yr?
Show your work. mm/yr
What is the average speed that BAF drifted from A? mm/yr
Which plate moved faster relative to the ridge over the past 67.7 Myr, if either?
2)
The area between CNA and BNA in Fig. A2.7.1 consists of oceanic lithosphere added along the Mid-Atlantic Ridge to the North American Plate between 154.3 and 67.7 Myr.
What is the average speed at which new lithosphere was added to the North American Plate along that line? Show your work. mm/yr
Do the same analysis for the lithosphere between points CAF and BAF What is the average speed at which new lithosphere was added to the African Plate along that line? mm/yr
Which plate moved faster relative to the ridge between 154.3 and 67.7 Myr, if either?
3)
Did the North Atlantic Ocean Basin develop by adding lithosphere symmetrically along the mid-ocean ridge, or was new lithosphere added more rapidly to one side than the other?
If spreading was asymmetric, which plate had more lithosphere added, or did the asymmetry vary from plate to plate over time?
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