@article{oai:niigata-u.repo.nii.ac.jp:00006837, author = {Kurita, Hiroshi and Ishikawa, Yukako}, journal = {Science reports of Niigata University. (Geology), Science reports of Niigata University. (Geology)}, month = {Mar}, note = {Dinoflagellate cysts during the Middle Miocene Climatic Optimum (MMCO) are described from the Kamagui Formation along the Namiishi-zawa section, Tainai City, northern part of the Niigata sedimentary basin. Eleven samples yielded dinoflagellate cyst assemblages of generally high diversity, being composed of 32 taxa. They are indicative of the lower part of the Subzone b of the Diphyes latiusculum Zone (16.3-15.9 Ma). This confirms the timing of the rift progagation in this area during the backarc spreading. Comparison with the coeval data from eastern South Korea suggests possible paleoenvironmental control on the paleogeographic distribution of dinoflagellate cysts in this interval.}, pages = {63--79}, title = {Dinoflagellate cysts during the Middle Miocene Climatic Optimum (MMCO) from the Namiishi-zawa section of the Kamagui Formation, northern Niigata, central Japan}, volume = {24}, year = {2009} }