Archaeomagnetic dating example
This is what Sternberg (195) has referred to as a "regional pattern-matching method" of dating because the sample direction is compared to the pattern of regional secular variation, via the reference curve, in order to determine the best date range.
Apart from one exception, all the mean characteristic remanent magnetisation directions are concentrated on the Early Medieval part of the directional archaeomagnetic reference curve of Austria at about 900 AD.In contemporaneity studies, or relative dating, sample VGPs are compared to each other to determine whether they are statistically different at the 5% significance level.The same statistical tests (Mc Fadden and Lowes 1981: equations 23 and 25) are used for both statistical dating against a curve and contemporaneity studies.Journal of Archaeological Science: Reports, Elsevier, 2015, 2, pp.688-698. In the conventional application of archaeomagnetic research, the data from an archaeomagnetic sample of unknown age are compared to a regional record of secular variation in order to determine the best-fit date range for the feature's last firing event.This process, in which the rotation of a planet with an iron core produces a magnetic field, is called a dynamo effect.
The Earth's magnetic core is generally inclined at an 11 degree angle from the Earth's axis of rotation.
The difference is in the type of question that is addressed.
Adhere the plastic reference discs to the feature using epoxy resin glue.
Using this curve archaeomagnetic dating provides ages between 8 AD, which are in agreement with the archaeological dating.
Together with the archaeological age estimates and stratigraphic information the new data have been included into the database of the Austrian curve and it has been recalculated using a new version of Ren Curve.
Therefore, the magnetic north pole is at approximately an 11 degree angle from the geographic north pole.