干旱区生态环境知识资源中心(Arid): Late Miocene drying of central Australia

Arid

DOI	10.1016/j.palaeo.2018.10.008
	Late Miocene drying of central Australia
	Mao, Xuegang 1,2; Retallack, Gregory 2
通讯作者	Retallack, Gregory
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2019
卷号	514 页码:292-304
英文摘要	A back to the future approach to climate change refines Neogene records of paleoclimatic cooling and drying as future climate states for a warming world. Near Alcoota station in central Australia is a late Miocene fossil mammal site for Alcoota (10 Ma) and Ongeva (8 Ma) local faunas. The Alcoota fauna includes the largest known land bird (Dromornis stirtoni) and early diprotodontid (Kolopsis torus), but the geologically younger Ongeva fauna has a larger diprotodontid (Zygomaturus gilli). These faunas are evolutionary predecessors of Australian Pleistocene megafauna. Calcareous paleosols recorded a marked turn toward aridity compared with underlying thick lateritic duricrusts which lack fossils. Laterites of likely middle Miocene age are evidence of wet (> 1100 mm mean annual precipitation) tropical (> 17 degrees C mean annual temperature) paleoclimates, but these were deeply eroded and redeposited by the time of the late Miocene mammals. A succession of 19 paleosols of 5 pedotypes were recognized in the 19 m thick section, with shallow calcareous nodule (Bk) horizons as evidence of mean annual precipitation ranges from 100 to 400 mm, and mean annual range of precipitation of 50 mm, very similar to the modern climate of Alcoota (296 mm precipitation with 56 mm difference between wet and dry month). This was neither a rainforest nor monsoonal paleoclimate, and vegetation inferred from paleosols was open woodland and gallery woodland similar to that of today. Central Australia was not covered by monsoon rainforest during the late Miocene and its paleoclimatic history of Neogene desertification matches well that of other parts of the world.
英文关键词	Laterite Caliche Paleosol Paleoclimate Mulga Rainforest
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000456355800022
WOS关键词	LIVISTONA PALMS ; CLIMATE ; PALEOSOLS ; EVOLUTION ; BOUNDARY ; RECORD ; LAND
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217858
作者单位	1.Fujian Normal Univ, Inst Geog, Fuzhou 350007, Fujian, Peoples R China; 2.Univ Oregon, Dept Earth Sci, Eugene, OR 97403 USA
推荐引用方式 GB/T 7714	Mao, Xuegang,Retallack, Gregory. Late Miocene drying of central Australia[J],2019,514:292-304.
APA	Mao, Xuegang,&Retallack, Gregory.(2019).Late Miocene drying of central Australia.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,514,292-304.
MLA	Mao, Xuegang,et al."Late Miocene drying of central Australia".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 514(2019):292-304.