Physics
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pepi...64..342h&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 64, Issue 2-4, p. 342-347.
Physics
Scientific paper
Palaeomagnetic results from Iraqi standard 2.5-cm Jurassic limestone specimens show weak intensities and directions of remanence that are initially randomly scattered, other than an absence of high inclinations. When these are sliced parallel to the bedding in ~ 1-cm discs, their intensity increases and their directions show greater stratigraphic consistency. The age of the remanence appears to be primary (early diagenetic) on the basis of their sedimentological properties. The magnetization is unrelated to mineralogy and is interpreted as normal and reversely magnetized components within standard sized samples. This suggests that, at this time, frequent polarity changes took place resulting in similar polarities within stratigraphic zones < 2-3 cm thick, corresponding to at least five polarity transitions per million years.
Present address: Department of Geological Sciences, Polytechnic South West, Plymouth, PL4 8AA, England.
Hijab B. R.
Tarling Donald H.
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