Results of mineralogical and geochemical investigations of post-Middle Jurassic deposits of the Atlantic Ocean are based on materials of the Deep Sea Drilling Project. Comparative characteristics of primary matter for ''black shales'' are given. Exhalative origin of heavy metal accumulation in near-axial sedimentary deeps of the Mid-Atlantic Ridge (23°N) are shown. History of post-Middle Jurassic sedimentation is considered on the base of clay mineral-, clastic component-, trace and rare- chemical element studies.

Supplement to: Timofeev, Pyotr P; Varentsov, Igor M; Renngarten, N V; Rateev, Mikhail A; Bogolyubova, L I; Stukalova, I E; Sakharov, B A; Eliseeva, T G (1984): Problemy litologii Mirovogo okeana. Mineralogiya i geokhimiya Atlanticheskogo okeana (Problems of Lithology of the World Ocean: Mineralogy and Geochemistry of the Atlantic Ocean). Geological Institute of the USSR Academy of Sciences, Transactions, vol. 397. Nauka Publ. (Moscow); Timofeev, P.P. (Ed.), 188 pp