title: Cometary particles: thin sectioning and electron beam analysis.
abstract: Thin sections (500 to 1000 angstroms thick) of individual micrometeorites (5 to 15 micrometers) have been prepared with an ultramicrotome equipped with a diamond knife. Electron microscopic examination of these sections has revealed the internal structures of chondritic micrometeorites, and a subset of highly porous, fragile particles has been identified. Delicate meteoritic materials such as these are characteristic of debris from cometary meteors.
authors.forename: J P
authors.initials: JP
authors.lastname: Bradley
authors.forename: D E
authors.initials: DE
authors.lastname: Brownlee