Are burnt sediments reliable recorders of geomagnetic field strength?

Publication year: 2011 Source: Quaternary Research, Available online 12 December 2011 Manuel Calvo-Rathert, Ángel Carrancho, Florian Stark, Juan José Villalaín, Mimi Hill This study tests if burnt soils and sediments can provide reliable records of geomagnetic field strength at the time of burning by carrying out an experiment to reproduce the prehistoric use of fire on a clayish soil substratum. Rock magnetic experiments showed that in the upper 0–1 cm of the central part of the burnt surface, remanence is a thermoremanent magnetization carried by single-domain magnetite and that samples are thermally stable. Fourteen specimens from that area were subjected to paleointensity experiments with the Coe method (1967).

Publication year: 2011 Source: Quaternary Research, Available online 12 December 2011 Manuel Calvo-Rathert, Ángel Carrancho, Florian Stark, Juan José Villalaín, Mimi Hill This study tests if burnt soils and sediments can provide reliable records of geomagnetic field strength at the time of burning by carrying out an experiment to reproduce the prehistoric use of fire on a clayish soil substratum. Rock magnetic experiments showed that in the upper 0–1 cm of the central part of the burnt surface, remanence is a thermoremanent magnetization carried by single-domain magnetite and that samples are thermally stable. Fourteen specimens from that area were subjected to paleointensity experiments with the Coe method (1967).

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Are burnt sediments reliable recorders of geomagnetic field strength?