Late Quaternary calcareous nannofossils in ODP Leg 139 holes
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资源简介：
Upper Quaternary calcareous nannofossils contained in drill cores taken in the heavily sedimented Middle Valley of the northern Juan de Fuca Ridge in the northeast Pacific Ocean...
采自东北太平洋胡安德富卡海脊北段沉积作用强烈的中段谷钻探岩芯中的上更新世（Upper Quaternary）钙质超微化石（calcareous nannofossils）……
