Dinoflagellate cysts, acritarchs, pollen grains and spores were recovered from both Mesozoic and Cenozoic sections cored during Leg 11. For this report the distribution of dinoflagellates is emphasized. Broad changes of the spore and pollen assemblages are discussed only as they relate to the dinoflagellate stratigraphy. Acritarchs were not studied, although this group is numerically important in local portions of the Mesozoic. Preservation of the dinoflagellates varies from good to excellent, especially in Mesozoic coccolith oozes where relatively uncompressed cysts occur. They are generally well-preserved, also, in those samples where only a few specimens were found. Cysts are most abundant in the coccolith oozes and carbonaceous clays of Mesozoic age cored at Holes 99A, 100, 101 A, and 105. Very few specimens were recovered from the foraminiferal oozes cored at Site 98, and the recrystallized limestones cored at Sites 100 and 105. MESOZOIC DINOFLAGELLATES Dinoflagellates were recovered from most samples of Holes 99A, 100, 101A and 105. They are rare or absent in various samples from Cores 13 and 14 at Hole 99A, Cores 2, 3, 5 and 6 at Hole 100, and Cores 30 through 35 at Hole 105.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.