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Illustration of Magnetic Anomalies Forming Along Mid-Ocean Ridge
File Name m00001.img.209.magnetic.anomalies.ridge.jpg
Data Type diagram
Computer Program Not specified
File Size 332.00 KB - 2 files [ jpg,pdf ]
Expert Level Middle School (Grade 6-8)
Contributor ERESE Database Team
Source USGS
Resource Matrix Seafloor Spreading
Step-by-step formation of oceanic crust. Three illustrations depict the formation of magnetic anomalies along a mid-ocean ridge. Over geologic time, two tectonic plates move in opposite directions from the oceanic ridge, and magma rises to the sea floor and solidifies, recording the reversed or normal magnetic field orientation. This creates the striped pattern on the ocean floor. Note that the stripes have irregular boundaries and that they are not perfectly linear due to irregular distribution of volcanism at mid-ocean ridges.
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