The Rate Of Spreadding Of The Atlantic Sea Floor

For example here is the calculation for the south atlantic. The spreading rate of the north atlantic ocean is 25 mm yr while in the pacific region it is 80 145 mm yr. Ridges that spread at rates 20 mm yr are referred to as ultraslow spreading ridges 3 13 e g the gakkel ridge in the arctic ocean and the southwest indian ridge.

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Solved The Map Above Shows The Age Of The Atlantic Ocean Chegg Com

Calculating Sea Floor Spreading

Solved Activity 2 5 Atlantic Seafloor Spreading A The Ma Chegg Com

Solved Investigation 2 8 Seafloor Spreading 1 Some Area Chegg Com

Solved Figure 2 11 Rates Of Motion Of The Earth S Major P Chegg Com

Solved Activity 3 7b Www Calculating The Rate Of Seafloor Chegg Com

Distance x100 000 cm km rate of spreading 2.

The rate of spreadding of the atlantic sea floor.

The highest known rate is over 200 mm yr in the miocene on the east pacific rise. The east pacific rise on the other hand is a fast spreading center. Use the above equation to calculate spreading rate. Ranges of spreading throughout the world s oceans.

Determine the rate of seafloor spreading for the pacific and north atlantic ocean basins. Miles per hour is distance traveled divided by the time age so in this case it is the distance that the seafloor has traveled divided by the age. Intermediate ridges have a spreading rate of 40 90 mm year while slow spreading ridges have a rate less than 40 mm year. 1cm yr to 10 cm yr.

It spreads about 6 16 centimeters 3 6 inches every year. It spreads 2 5 centimeters 8 2 inches every year and forms an ocean trench about the size of the grand canyon. Distance 72 km x 100 000 cm km 7 200 000 cm rate of spreading 7 200 000 cm 2 000 000 yr 3 6 cm yr tii 1. Seafloor spreading rates are much more rapid in the pacific ocean than in the atlantic and indian oceans.

The highest known rate is over 200 mm yr in the miocene on the east pacific rise. This means that north america and europe are moving away from each other at about the rate it takes for your fingernails to grow. Ages for ocean floor between the oldest identified magnetic anomalies and continental crust are interpolated by geological estimates of the ages of passive continental margin segments. These age data also allow the rate of seafloor spreading to be determined and they show that rates vary from about 0 1 cm 0 04 inch per year to 17 cm 6 7 inches per year.

The dates revealed that the atlantic ocean was opening by seafloor spreading from the mid atlantic ridge at a rate of about 0 02 metres per year. Measure from the center of the spreading center to a known age point on the plate rather than from 65 ma on the eastern plate to 65 ma on the western plate. R d t or r 9 5 10 7 cm 6 5 10 7 years 1 46 cm yr. We have used our echo sounding data discussed in a previous expedition to make the profile of the mid atlantic ridge along the seafloor shown below.

The mid atlantic ridge for instance is a slow spreading center. The age spreading rate and asymmetry at each grid node are determined by linear interpolation between adjacent seafloor isochrons in the direction of spreading. Remember rate of motion e g.