广西钦州、玉林地区的志留系和泥盆系

<正> 广西钦州、玉林地区是研究中国南方志留系、泥盆系,特别是含笔石、竹节石地层的重要地区。这个地区的志留、泥盆系是由广西区测队、广西第三地质队等单位最先研究的。汪啸风(1977,1978a)曾著文发表了钦州的志留纪地层和笔石动物群。玉林地区的泥盆纪

The Silurian and Devonian of Qinzhou and Yulin, Guangxi

Silurian and Early Devonian graptolite and fentaculi oid-bearing strata are well developed in con-thern Guangxi. 15 graptolite zones or assemblages are recognized in descending order: yukoneusis jan-gensis and yukonensis himalayensis (Pragian), of. falcarious (Lochkovian to Pragian), hereynicus, um-formis-acquabilis (Lochkovian), transgrediens proximus,ex. gr similis,and ultirnus (Pridolian), tumesiens scanicus, and nilssoni (Ludlovian), ludensis and sakmaricus(Wenlockian), O. spiralis-Stomaiograptus,grie-stoniensis minuta and cxiguus (Llandoverian). 3 Dalejan and 2 Zlichovian tentaculitoid zones are proposed here: richteri, cancellata, elegans, bar randei and praecursor. In association with graplolites, 2 Pragian and 1 Lochkovian tentaculitoid zones are acuaria-strangulata, acuarria and bohemica.