越南东北部Cat Ba岛泥盆系-石炭系过渡层的初探(英文)[越南语论文]

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The Pho Han Formation is exposed on southernCat Ba Island,Hai Phong Province in northeasternVietnam,and intercalates the Devonian and Carbonif-erous(D-C)boundary(Ta and Doan,2017;Komatsu etal.,2017).The D-C boundary section consists mainlyof limestone beds,numbered from1to167,interca-lated with alternating black organic-rich shales.Thelimestone yields abundant brachiopods,crinoid-stemsand conodonts.Preliminary investigations on strati-graphy(conodont biostratigraphy andδ13C)and se......(论文页数是:1页)      

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