A detailed analysis of the texture, matrix, and elements of the microfacies from the carbonate sequence recovered in ODP Hole 639D resulted in a typological classification of 10 major microfacies types and their variants. The variations in distribution and succession of type microfacies allowed us to divide the carbonate sequence into 12 facies-defined subunits. Based on the analyzed characteristics and their relations, we also propose a paleoenvironmental interpretation involving a mixed carbonate/terrigenous ramp model instead of the previous, classical zoned carbonate platform.

Abundances: A = >20 %, C = 5-20%, f = 1-5%, r = <1%. - = not present

Supplement to: Moullade, Michel; Loreau, Jean-Paul; Thurow, Juergen W; Cros, Pierre; Cousin, Michel (1988): Microfacies of Upper Jurassic limestones, ODP Site 639. In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 59-88