化石鉴定相关论文
埃迪卡拉纪陡山沱期及早寒武世磷酸盐化球形微体化石的生物属性及个体大小所体现的种属特征一直存在争议,现代人工模拟磷酸盐化动......
A stone core and Paleoloxodon fossils were found at Xidan, Beijing in 1997.The stratum containing the core consists ......