An early solar system magnetic field recorded in CM chondrites

C. Cournede, J. Gattacceca, M. Gounelle, P. Rochette, B.P. Weiss, B. Zanda

Earth and Planetary Science Letters
Volume 410, 15 January 2015, Pages 62–74


Considering the timescale and intensities of primordial magnetic fields, both internally generated fields from a putative dynamo and external fields, generated in the protoplanetary disk, may have been recorded by CM chondrites. It is presently difficult to discriminate between the two hypotheses. Regardless, CM chondrites likely contain the oldest paleomagnetic record yet identified.