F. Hoyle et al., An object within a particle of extraterrestrial origin compared with an object of presumed terrestrial origin, ASTRO SP SC, 268(1-3), 1999, pp. 43-44
Filamentary objects of submicron size isolated from an extraterrestrial par
ticle and from the Gunflint cherts are compared and shown to have similarit
ies of size, shape and interior structure.