EarthRef.org Digital Archive (ERDA)
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Detailed File Information
Magnetic Reversal Data and Timescale
File Name m00006.img.285.magnetic.data.timescale.jpg
Data Type diagram
Computer Program Adobe Illustrator 10
File Size 336.00 KB - 2 files [ jpg,pdf ]
Expert Level Middle School (Grade 6-8)
Contributor ERESE Database Team
Source Joesten
Resource Matrix The Earth's Magnetic Field
Description
The figure represents magnetic data taken from multiple locations around the world. It shows whether or not the samples were formed during a time that had a normal or reversed magnetic field. Each dot represents a different rock sample, which were then used to determine when the magnetic field was normal or reversed. The magnetic time scale is also included, which was created by radiometric dating of each sample to determine their ages. Magnetic chrons are defined as periods in which magnetic polarity remains stable, i.e. Brunhes Normal Chron and Matuyama Reverse Chron.
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