Mesozoic foraminifers and microfacies from holes 400A, 401 and 402A of the DSDP Leg 48, ( Bay of Biscay).

Abstract

Mesozoic deposits were penetrated at 3 sites in the Bay of Biscay. The oldest layers reached are of Aptian age in Holes 400A and 402A and of U.Jurassic age at Site 401. The Mesozoic sequence is zoned according to the scheme of Sigal (1976). The first part of the paper presents the chronostratigraphic data from the bottom to the top of the section in each site; the second part involves discussion of the paleontological assemblages in an attempt to establish a paleoenvironmental reconstruction. -from Author