File:Oceanic.Stripe.Magnetic.Anomalies.Scheme.gif

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Summary

Description

A theoretical model of the formation of magnetic striping. New oceanic crust forming continuously at the crest of the mid-ocean ridge cools and becomes increasingly older as it moves away from the ridge crest with seafloor spreading:

a. the spreading ridge about 5 million years ago.
b. about 2 to 3 million years ago.
c. present-day.

/!\ caution: the colours used on this picture may suggest that great amounts of magma are coming from beneath the lithosphere. That is not the case: only a small amount of magma is produced (red dots below the ridge crest). The orange part is Asthenosphere.

Date

Unknown date

Source

http://pubs.usgs.gov/publications/graphics/Fig7.gif

Author

United States Geological Survey

Permission
(Reusing this file)

This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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Derivative works of this file: Oceanic Stripe Magnetic Anomalies Scheme He.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	13:09, 24 February 2006		255 × 187 (15 KB)	Kurgus	A theoretical model of the formation of magnetic striping. New oceanic crust forming continuously at the crest of the mid-ocean ridge cools and becomes increasingly older as it moves away from the ridge crest with seafloor spreading: * a. the spreadi