If you have questions about licensing content on this page, please contact [email protected] for more information and to obtain a license. The rocks get older with distance from the ridge crest. If it matches - great, you can start marking down which normal and reverse isochrons match your profile. 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Geophysicists can read these patterns from the magnetic anomalies they measure with a magnetometer. The models show a ridge (a) about 5 million years ago (b) about 2 million years ago and (c) in the present. D: As two continental plates collide along a convergent boundary, mountains are formed, GIVING BRAILIEST AND 100 POINTS!! Basalt forming at the ridge crest picks up the existing magnetic polarity. What could cause this? U.S. Department of Commerce This provided the first clear geophysical evidence for continental drift. Since the highest temperature was 32C (90F), we know that it was a warm day. When you reach out to him or her, you will need the page title, URL, and the date you accessed the resource. How weathering erosion or plate tectonics can affect? The north pole becomes the south pole, and the south pole becomes the north pole. Road cuts are a convenient man-made source of outcrops. 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Crest picks up the existing magnetic polarity of thermoremanent magnetisation in archaeological materials is archaeomagnetic!
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