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为进一步弄清楚中国北方新近系红土的沉积环境,从古生物的角度出发,针对天水-秦安一带新近系沉积地层中发现的大量古脊椎动物化石进行研究,结果发现:化石组合的典型特征是大量三趾马的存在,同时伴有大量的犀类及长鼻类化石,这一特点与临夏地区极为一致,表明至少在晚中世以前该地区气候还是相当湿润的,无法产生类似黄土的新近系风成红土沉积,这也同时得到邻近其它地区相关古生物证据的支持,古脊椎动物化石证据并不支持红土唯一风成的推论.
To further clarify the sedimentary environment of lateritic laterites in north China, a large number of paleo-vertebrate fossils found in the sedimentary strata of the Neogene of the Tianshui-Qin’an area were studied from the point of paleontology. The results showed that the typical features of the fossil assemblage are a large number of three The presence of toe-horses, accompanied by a large number of rhinoceros and proboscis fossils, is very much in line with the region of Linxia, indicating that the climate in this region was quite humid until at least the late Middle Ages and could not produce loess-like Neogene Laterite deposition, which is also supported by evidence from other nearby paleontologists, does not support the corollary of the only provenance of laterite.