期刊名称:Publicación Electrónica de la Asociación Paleontológica Argentina
电子版ISSN:2469-0228
出版年度:1992
卷号:2
期号:1
页码:41-44
出版社:Asociación Paleontológica Argentina
摘要:In the northwestern part of the Sierra de Barreal, at San Juan Province, a deltaic facies of the El Retamo Formation contains remains of plants and invertebrates. The plant fossils fall within the range of the NBG zone of late Carboniferous age.