Information about Brunhes Matuyama Reversal
The Brunhes-Matuyama Reversal was a geologic event, approximately 780,000 years ago, when the Earth's magnetic field last underwent reversal. The reversal occurred over several thousand years. The apparent duration at any particular location varied from 1,200 to 10,000 years depending on geomagnetic latitude and local effects of non-dipole components of the Earth's field during the transition.[1] The event is useful in dating ocean sediment cores and subaerially erupted volcanics.
It is named for Bernard Brunhes and Motonori Matuyama.
It is named for Bernard Brunhes and Motonori Matuyama.
See also
References
1. ^ Bradford M. Clement (2004). "Dependence of the duration of geomagnetic polarity reversals on site latitude". Nature 428.
Further reading
- Behrendt, J.C., Finn, C., Morse, L., Blankenship, D.D. "One hundred negative magnetic anomalies over the West Antarctic Ice Sheet (WAIS), in particular Mt. Resnik, a subaerially erupted volcanic peak, indicate eruption through at least one field reversal" University of Colorado, U.S. Geological Survey, University of Texas. (U.S. Geological Survey and The National Academies); USGS OF-2007-1047, Extended Abstract 030. 2007.
Oceanic crust 0-20 Ma
..... Click the link for more information.
..... Click the link for more information.
Earth's magnetic field (and the surface magnetic field) is approximately a magnetic dipole, with one pole near the north pole (see Magnetic North Pole) and the other near the geographic south pole (see Magnetic South Pole).
..... Click the link for more information.
..... Click the link for more information.
A geomagnetic reversal is a change in the orientation of Earth's magnetic field such that the positions of magnetic north and magnetic south become interchanged. These events, which are believed to last a few hundred to a few thousand years, often involve an extended decline in
..... Click the link for more information.
..... Click the link for more information.
Bernard Brunhes (1867-1910) was a French geophysicist known for his pioneering work in paleomagnetism, in particular, his 1906 discovery of geomagnetic reversal. The Brunhes-Matuyama reversal is named for him.
..... Click the link for more information.
..... Click the link for more information.
Motonori Matuyama ( b. Oct 25, 1884, d. Jan 27, 1958) was a Japanese geophysicist who was born at Uyeda (now Usa) in Japan, the son of a Zen abbot. He was educated at the University of Hiroshima and Kyoto Imperial University, where he was appointed to a lectureship in 1913.
..... Click the link for more information.
..... Click the link for more information.
A geomagnetic reversal is a change in the orientation of Earth's magnetic field such that the positions of magnetic north and magnetic south become interchanged. These events, which are believed to last a few hundred to a few thousand years, often involve an extended decline in
..... Click the link for more information.
..... Click the link for more information.
The Jaramillo reversal was a reversal of the Earth's magnetic field that occurred approximately one million years ago. In the geological time scale it was a "short-term" positive reversal in the then-dominant Matuyama reversed magnetic chronozone; its beginning is widely dated to
..... Click the link for more information.
..... Click the link for more information.
This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.
Herod_Archelaus
