新疆拜城早白垩世孢粉植物群及其环境意义<sup>*</sup>

doi:10.7605/gdlxb.2008.01.009

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Abstract Based on the investigation of 48 species of spores and pollen belonging to 29 genera found in the Lower Cretaceous Shushanhe Formation in the Baicheng district of the Xinjiang Autonomous Region，the early Early Cretaceous palynoflora in the area has been established. The palynoflora of the Shushanhe Formation is characterized by the dominance of Cheirolepidiaceae of Coniferales and the influence of Lygodiaceae of Filicales. In accordance with the characters of the palynoflora，the early Early Cretaceous palaeoecological，palaeoclimatic and palaeogeographic characters have been discussed. Because the Cheirolepidiaceous plants were drought resistant and thermophilic trees and shrubs，and both the Cheirolepidiaceae and Lygodiaceae were most common in subtropical climates in that period，the palynoflora indicated a dry and rather hot climate. Judging from the palynological data，the early Early Cretaceous palaeoclimate in the Baicheng district should belong to the arid type of subtropical zone. The biodiversity of the palynoflora and the obvious zonality of the plant geographic distribution show that the early Early Cretaceous palaeogeography in the area should possess complex and various landscapes，including multi-peaked mountains，mountain valleys，mountain streams，river delta marsh and marsh wetland etc.

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	Jiang Dexin
	Wang Yongdong
	Wei Jiang

Key words： Xinjiang Autonomous Region Baicheng Tarim Basin Early Cretaceous palynoflora palaeoclimate palaeogeography

Received: 20 June 2007 Published: 01 February 2008

ZTFLH:

Q913.84

About author: Jiang Dexin，born in 1933，graduated from the Department of Petroleum Geology，Beijing College of Geology in 1956. Now she is a research professor of Institute of Geology and Geophysics，Chinese Academy of Sciences，and is engaged in palynology and petroleum geology.

Cite this article:

Jiang Dexin,Wang Yongdong,Wei Jiang. Palynoflora and its environmental significance of the Early Cretaceous in Baicheng，Xinjiang Autonomous Region[J]. JOURNAL OF PALAEOGEOGRAPHY, 2008, 10(1): 77-86.

Jiang Dexin,Wang Yongdong,Wei Jiang. Palynoflora and its environmental significance of the Early Cretaceous in Baicheng，Xinjiang Autonomous Region[J]. JOPC, 2008, 10(1): 77-86.

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http://journal09.magtechjournal.com/gdlxb/EN/10.7605/gdlxb.2008.01.009 OR http://journal09.magtechjournal.com/gdlxb/EN/Y2008/V10/I1/77

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