The map of the northern Atlantic Ocean Basin (Fag M1) shows in Arons (I linde b
ID: 286066 • Letter: T
Question
The map of the northern Atlantic Ocean Basin (Fag M1) shows in Arons (I linde b Maria Seton and hercolleagues of equal age) of the basaltic crust tbeneath the sediments that have accumulated on the seaftoor. These isochrons were (2012) from an analysis of marine magnetic anomalies, and their ages are GPlate, (http.//www.gplates.org) was used to help make thi·map. The red line on dinergent boundary the axis of the mid-ocean ridge-between the North Am based on the geomagnetic polarity time scale. the map shows the location of the American and African Plases 30W North American Plate African Plate AF NA 154.3 My (M25) 1500km approximate scale at center of map Figure A6.1 the The approximate great-circle distances between the points identified on the map are listed here. The uncertainty in distances provided is probably on the order of 10 km 1354 km 1338 km 1320 km 1279 km 2017km 2599 km 2649 km 5107 km Cs to A Cr to B Bu to A BaF to A Bn to Bx OA to C 1. What is the average speed at which Ba drifted away from the ridge at A during the past 67.7 Myr expressed in cm/yr.? cm/yr What is the average speed that BAF drifted from A· cm/yT. Which plate moved faster relative to the ridge over the past 67.7 Myr, if either? 2. The area between Cys and Byu consists of oceanic lithosphere added along the Mid-Atdantic Ridge to the North American Plate between 154.S and 67.7 Myr. What is the average speed at which new lithosphere was added to the North American Plate along that line?m/y Do the same analysis for the lthosphere between points Cav and Bar. What is the average speed at which new lithosphere was added to the African Plate along that line? .cm/y. Which plate moved faster relative to the ridge between 154.3 and 67.7 Myt, if either?Explanation / Answer
1.8 centimeter on scale = 1,500 km
Distance between point BNA and A = 2 centimeter on figure
Distance between point BNA and A in kilometer = (2/1.8) x 1,500
Distance between point BNA and A in kilometer = 1,666.66 km
= 1,666.66 x 1000 meters = 1,666,666.667 meters
1,666,666.667 meters = 166,666,666.7 cm
Time for movement = 67.7 million years = 67.7 x 106 years
Therefore, the rate at which points BNA and A have been moving apart from each other= 166,666,666.7 cm/ 67.7 x 106 years
Therefore, the rate at which points BNA and A have been moving apart from each other = 2.461841 cm/year
1.8 centimeter on scale = 1,500 km
Distance between point BAF and A = 1.9 centimeter on figure
Distance between point BAF and A in kilometer = (1.9/1.8) x 1,500
Distance between point BAF and A in kilometer = 1,583.33333333 km
= 1,583.33333333 x 1000 meters = 1,583,333.3333 meters
1,583,333.3333 meters = 158,333,333.333 cm
Time for movement = 67.7 million years = 67.7 x 106 years
Therefore, the rate at which points BAF and A have been moving apart from each other= 158,333,333.333 cm/ 67.7 x 106 years
Therefore, the rate at which points BAF and A have been moving apart from each other = 2.3387 cm/year
Therefore plate BNA moves faster compared to plate BAF.
1.8 centimeter on scale = 1,500 km
Distance between point CNA and BNA = 1.9 centimeter on figure
Distance between point CNA and BNA in kilometer = (1.9/1.8) x 1,500
Distance between point CNA and BNA in kilometer = 1,583.33333333 km
= 1,583.33333333 x 1000 meters = 1,583,333.3333 meters
1,583,333.3333 meters = 158,333,333.333 cm
Time for movement = 154.3 - 67.7 million years = 86.6 x 106 years
Therefore, the rate at which points CNA and BNA have been moving apart from each other= 158,333,333.333 cm/ 86.6 x 106 years
Therefore, the rate at which points CNA and BNA have been moving apart from each other = 1.828329 cm/year
As per chegg's policy we are adviced to attempt first 4 questions of a questioner, please post the remaining question as a different questioner. Thanks
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.