cosmic sediment

cosmic sediment

[′käz·mik ′sed·ə·mənt]
(geology)
Particles of extraterrestrial origin which are observed as black magnetic spherules in deep-sea sediments.
References in periodicals archive ?
In its July 1984 expedition, Maurette's group vacuumed up about 10 kilograms of cosmic sediments from the bottom of one such lake.