中背板相关论文
SummaryThefossilophiuroidsdescribedinthispaperwascol lectedfromtheTongziyanFormationneartheKengbingCoalMineinLongyan .Thisformationisasuiteofparalicfaciesofcoal bearingrockseriesofabout 6 0 0to 80 0mthickandseparatedintothreemembersascendingly .Thelowerme......