26. LEG 41 SEDIMENT LIPIDS—SEARCH FOR EOLIAN ORGANIC MATTER IN RECENT SAMPLES AND EXAMINATION OF

The lipids extracted from samples in the eastern North Atlantic Ocean (Sites 367 and 369) were examined for terrigenous components. The Pliocene samples from both sites contain n-alkanes and /i-fatty acids of mainly allochthonous terrigenous origin with homolog distributions typical of higher plant waxes. This material underwent eolian transport and was preserved under probable anoxic microenvironmental conditions of sedimentation. A Cretaceous black shale, deposited under anoxic conditions, contains lipids derived from both marine and terrigenous sources. Diterpenoids and carbon isotope ratios provide the primary indicators for terrigenous lipids