title: Rare-Earth Elements in Tektites.
abstract: The rare-earth element content of three tektites has been determined by neutron activation analysis. The relative abundance patterns are all nearly alike and are identical to the pattern characteristic of well-differentiated terrestrial sediments. Possible consequences of finding this pattern in truly extraterrestrial matter are considered.
authors.forename: L
authors.initials: L
authors.lastname: Haskin
authors.forename: M A
authors.initials: MA
authors.lastname: Gehl