Formation Of Neumann Bands in the Reed City and Hammond Township Meteorites

Abstract

METALLOGRAPHIC examination of samples from the British Museum collection confirms the fact¹ that Neumann bands exist only in regions near to the original surface of the Reed City meteorite (B.M. 86426); and also reveals their presence in association with the deep cracks which follow the massive phosphide crystals in the Hammond Township meteorite (B.M. 67447). Both these meteorites have been thermally metamorphosed to a considerable extent and, apart from the instances quoted here, both are free of Neumann bands.