A first secular variation curve for the Iberian Peninsula
Abstract
A palaeomagnetic study has been carried out at 22 archaeological sites in the Iberian Peninsula. These new results together with data from 4 sites previously studied in Iberia and data from neighbouring countries (southern of France and northern Morocco) have been compiled in order to obtain a first Secular Variation Curve for the Iberian Peninsula. Data from France and Morocco were selected from the Archaeomagnetic Database compiled by the Dept. of Geological Sciences, University of Plymouth, UK (D. Tarling). The selection criteria adopted was the following: Dating errors <50 years, number of samples > 5 and α95 < 3^o. A total amount of 54 data points with ages ranging from 200 BC up to 1500 AD have been used to construct the Madrid Preliminary Secular Variation Curve for the Iberian Peninsula, albeit with a gap between the 7th and 10th centuries. Palaeomagnetic directions were corrected to Madrid, using the Via-Pole Conversion method (Noel and Batt, 1990, Geoph. J. Inter, 70, 201--204). A 100 year something window moving in 50 years increments was applied to the data.
- Publication:
-
EGS - AGU - EUG Joint Assembly
- Pub Date:
- April 2003
- Bibcode:
- 2003EAEJA....13381N