Seafloor spreading rates worksheet answers.
Sea floor spreading ratez.
The rate at which new oceanic lithosphere is added to each tectonic plate on either side of a mid ocean ridge is the spreading half rate and is equal to half of the spreading rate.
Spreading rates determine if the ridge is fast intermediate or slow.
Seafloor spreading rates displaying top 8 worksheets found for this concept.
The continents bordering the atlantic ocean for example are believed to be moving away from the mid atlantic ridge at a rate of 1 2 cm 0 4 0 8 inch per year thus increasing the breadth of the ocean basin by twice that amount.
For the north atlantic ocean using the map in the lab.
Half spreading rates are based on stage rotations computed from our set of finite reconstruction rotations and spreading asymmetry estimates are based on determining the percentage of crustal accretion between pairs of adjacent isochrons by dividing the angular distance between them.
Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor.
This spreading creates a successively younger ocean floor and the flow of material is thought to bring about the migration or drifting apart of the continents.
Seafloor spreading rates are much more rapid in the pacific ocean than in the atlantic and indian oceans.
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On the basis of our seafloor isochrons and rotation model we have calculated seafloor spreading half rates and relative proportions of crustal accretion i e spreading asymmetry on conjugate ridge flanks.
However recent studies have questioned the empirical basis for high cretaceous global seafloor spreading rates high cretaceous sea level 230 320 m above present and the relationship between geochemical fluxes and spreading rates.
So 1 km 100 000 cm or 10 5 cm.
The east pacific rise is a mid ocean ridge that runs through the eastern pacific ocean and separates the pacific plate from the north american plate the cocos plate the nazca plate and the antarctic plate.
Spreading rate is the rate at which an ocean basin widens due to seafloor spreading.
At spreading rates of about 15 cm 6 inches per year the entire crust beneath the pacific ocean about 15 000 km 9 300 miles wide could be produced in 100 million years.
The mid atlantic ridge for instance separates the north american plate from the eurasian plate and the south american plate from the african plate.
1 km 1000 m.
Calculating sea floor spreading.
Rate of spreading distance the sea floor moved length of time or r d t generally expressed as cm yr.
High cretaceous ocean crust production rates have been causally linked to high global sea level and global co 2 due to increased outgassing.
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