title: Morphologies and origin of elemental carbon in the environment.
abstract: Carbon particles extracted from sediments collected by box coring from southeastern Lake Michigan were compared with carbon particles extracted from oil, coal, and wood fly ash. Sediments deposited after 1900 contained coal, oil, and wood carbons; older sediments contained only wood carbon.
authors.forename: J J
authors.initials: JJ
authors.lastname: Griffin
authors.forename: E D
authors.initials: ED
authors.lastname: Goldberg