title: Chromium and nickel in the fig tree shale from South Africa.
abstract: Exceptionally high contents of chromium and nickel in shales from the early Precambrian Fig Tree series of South Africa ( 3.1 x 10(9) years old) suggest that the ancient crustal rocks from which these sediments were derived were ultramafic in composition.
authors.forename: R V
authors.initials: RV
authors.lastname: Danchin