Over two hundred species of the Hipparion fauna belonging to the Baode Stage havebeen found in more than a hundred localities in China. All of these fossils had beenthought to come from the same horizon by most scient...Over two hundred species of the Hipparion fauna belonging to the Baode Stage havebeen found in more than a hundred localities in China. All of these fossils had beenthought to come from the same horizon by most scientists till the end of the 1950s.Since 1960, the Hipparion fauna has been discovered from different horizons and differentecologic groups, and extensive studies of taxonomy and evolution of some mammals展开更多
The faunal ecological type and sequence in the Tertiary red clay indicate that Hipparion fauna during the period 7.4-6.1 Ma in the middle reaches of the Yellow River is composed mainly of dorcadoides and mixed types. ...The faunal ecological type and sequence in the Tertiary red clay indicate that Hipparion fauna during the period 7.4-6.1 Ma in the middle reaches of the Yellow River is composed mainly of dorcadoides and mixed types. This represents semiarid veld environment with small fluctuation. The fossil assemblages characterized by the abundance of gaudryi types and even the occurrence of some Hominoid and Chalicotherium indicate an obviously warm and humid period since 5.3 Ma. The fossil assemblages during 3.4 Ma show the typical steppe fauna representing dry climate. It is indicated by the changes of ecological sequence that the cli-matic conditions in Pliocene are drier than that in late Mio-cene. The clay-skin content of red clay, which has a syn-chronous change with faunal features, is a rather good re-placing palaeoclimatic index.展开更多
The Lower Pliocene of the Linxia Basin in Gansu Province is one of only a few representative sections for the Early Pliocene sedimentary records in northern China, and even in East Asia. Recently,abundant mammalian fo...The Lower Pliocene of the Linxia Basin in Gansu Province is one of only a few representative sections for the Early Pliocene sedimentary records in northern China, and even in East Asia. Recently,abundant mammalian fossils were found from the base of red clays of the Lower Pliocene Hewangjia Formation at Duikang in Guanghe County within this basin. Previously, the Pliocene mammals were sparsely found in China, and most were collected from fluvial and lacustrine deposits in the eastern Loess Plateau. Mammals from the widely distributed Pliocene Hipparion Red Clay are less in number.The known fossils from Duikang include 20 species and belong to the Shilidun Fauna. Their faunal components are similar to the Early Pliocene Gaozhuang Fauna from Ynshe, Shanxi. On the other hand, some taxa from Duikang have not been found in the Gaozhuang Fauna, are slightly more primitive in evolutionary level, and appeared mainly in the Late Miocene. As a result, the age of the Duikang fossils may be slightly earlier than that of the Gaozhuang Fauna and closer to the lower boundary of the Piiocene. The Duikang fossiliferons bed is 0.8 m above the top of the Late Miocene Linshu Formation, and the first occurrence of the three-toed horse Hipparion pater can be regarded as a biostratigraphical marker of the Miocene/Pliocene boundary. In conclusion, Duikang is an ideal candidate locality to establish as the stratotype of the lower boundary of the Chinese terrestrial Pliocene.展开更多
THE climatic deterioration is an important event in the geological history and generally recog-nized by composition of strata and variation in some elements. However, the study on the cli-matic deterioration events in...THE climatic deterioration is an important event in the geological history and generally recog-nized by composition of strata and variation in some elements. However, the study on the cli-matic deterioration events in terms of age distribution of animals has been rarely reported.This note reports the study on a climatic deterioration event and its affected area during theMiocene Epoch based on thousands of fossils of Hipparion fauna from Longjiagou in Wudu,展开更多
文摘Over two hundred species of the Hipparion fauna belonging to the Baode Stage havebeen found in more than a hundred localities in China. All of these fossils had beenthought to come from the same horizon by most scientists till the end of the 1950s.Since 1960, the Hipparion fauna has been discovered from different horizons and differentecologic groups, and extensive studies of taxonomy and evolution of some mammals
基金This work was supported by the National Natural Science Foundation of China (Grant No. 49972004).
文摘The faunal ecological type and sequence in the Tertiary red clay indicate that Hipparion fauna during the period 7.4-6.1 Ma in the middle reaches of the Yellow River is composed mainly of dorcadoides and mixed types. This represents semiarid veld environment with small fluctuation. The fossil assemblages characterized by the abundance of gaudryi types and even the occurrence of some Hominoid and Chalicotherium indicate an obviously warm and humid period since 5.3 Ma. The fossil assemblages during 3.4 Ma show the typical steppe fauna representing dry climate. It is indicated by the changes of ecological sequence that the cli-matic conditions in Pliocene are drier than that in late Mio-cene. The clay-skin content of red clay, which has a syn-chronous change with faunal features, is a rather good re-placing palaeoclimatic index.
基金supported by the Ministry of Science and Technology of China (2006FY120300 and 2006CB806400)the Knowledge Innovation Program of the Chinese Academy of Sciences (KZCX2-YW-120, Q09)the National Natural Science Foundation of China (40730210), and the All-China Stratigraphic Commission
文摘The Lower Pliocene of the Linxia Basin in Gansu Province is one of only a few representative sections for the Early Pliocene sedimentary records in northern China, and even in East Asia. Recently,abundant mammalian fossils were found from the base of red clays of the Lower Pliocene Hewangjia Formation at Duikang in Guanghe County within this basin. Previously, the Pliocene mammals were sparsely found in China, and most were collected from fluvial and lacustrine deposits in the eastern Loess Plateau. Mammals from the widely distributed Pliocene Hipparion Red Clay are less in number.The known fossils from Duikang include 20 species and belong to the Shilidun Fauna. Their faunal components are similar to the Early Pliocene Gaozhuang Fauna from Ynshe, Shanxi. On the other hand, some taxa from Duikang have not been found in the Gaozhuang Fauna, are slightly more primitive in evolutionary level, and appeared mainly in the Late Miocene. As a result, the age of the Duikang fossils may be slightly earlier than that of the Gaozhuang Fauna and closer to the lower boundary of the Piiocene. The Duikang fossiliferons bed is 0.8 m above the top of the Late Miocene Linshu Formation, and the first occurrence of the three-toed horse Hipparion pater can be regarded as a biostratigraphical marker of the Miocene/Pliocene boundary. In conclusion, Duikang is an ideal candidate locality to establish as the stratotype of the lower boundary of the Chinese terrestrial Pliocene.
文摘THE climatic deterioration is an important event in the geological history and generally recog-nized by composition of strata and variation in some elements. However, the study on the cli-matic deterioration events in terms of age distribution of animals has been rarely reported.This note reports the study on a climatic deterioration event and its affected area during theMiocene Epoch based on thousands of fossils of Hipparion fauna from Longjiagou in Wudu,
