Continental slope samples offshore Guatemala contain organic matter derived from both terrestrial and marine sources. Upper Pleistocene samples are generally amorphous-rich, with TOCs averaging 2.4%. Pliocene and Miocene sediments contain varying amounts of terrestrial material that increase in proportion down toward the base of the slope. TOCs average 0.93%. The samples are currently immature for the generation of liquid hydrocarbons.

Supplement to: Gilbert, Deborah; Cunningham, Robert (1985): Organic facies variations in sediments from Leg 84, off Guatemala. In: von Heune, R; Aubouin, J; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 84, 739-742