Upper Sinian Doushantuo Formation

Neoproterozoic Wikipedia

Upper boundary GSSP In addition to Ediacaran biota two other types of biota were discovered in China the Doushantuo Formation and Hainan Formation Terminal period while Chinese geologists referred to it as the Sinian and most Australians and North Americans used the name Ediacaran

Get Price

Upper Sinian Doushantuo Formation

Upper Sinian Doushantuo Formation The Process of Tholin Formation in Titan s Upper Cartoon showing the chemical process leading up to the formation of tholins in Titan s upper atmosphere The process begins with free energy from solar UV radiation and

Get Price

The Weng an Biota Doushantuo Formation an

The base of the Dengying Formation can be dated to 551 Ma Condon et al 2005 In Weng an the Doushantuo Formation is composed of five units that have been described in detail by Xiao et al 2014b and Yin et The Weng an Biota occurs mainly in Unit 4 the Upper

Get Price

New microfossils from the neoproterozoic Sinian

· Well preserved three dimensional microfossils are reported from a m thick black phosphorite bed in the Sinian Doushantuo Formation at Wengan Phosphate Mine Guizhou Province southwest China The diverse assemblage observed in thin sections comprises planktonic acritarchs benthic cyanobacteria bacteria and thallophytes

Get Price

ISOTOPIC CHEMOSTRATIGRAPHY OF THE

The Late Proterozoic Upper Sinian is well deve loped and widespread in the Three Gorges of the Yangtze River and is divided into the Duoshantuo and Dengying formations accordingly with good biostratigraphic control and can be correlated world wide There are two tillite horizons under laying the Upper Sinian the Nantou Formation above and Gucheng Formation below and the former is

Get Price

Early Paleozoic Extension Compression Transition

· The Upper Sinian Dengying Formation in the Upper Yangtze area has a preserved thickness of 600 1000 m and can be divided into four categories on the basis of lithology Doushantuo Formation The mudstone of Doushantuo Fm in the eastern margin of the Sichuan Basin has an average TOC of %

Get Price

Lithofacies paleogeography and exploration

Petroleum Exploration and Development 2019 02 01 Lithofacies paleogeography and exploration significance of Sinian Doushantuo depositional stage in the middle upper

Get Price

Marine and Petroleum Geology CORE

of the Upper Sinian Dengying Formation were derived from both the Lower Cambrian and Upper Sinian source rocks and 2 in the Eastern Sichuan Basin basin consist of the Sinian Doushantuo and Dengying forma tions which were deposited during a major marine trans gression

Get Price

The Weng an Biota Doushantuo Formation an

The base of the Dengying Formation can be dated to 551 Ma Condon et al 2005 In Weng an the Doushantuo Formation is composed of five units that have been described in detail by Xiao et al 2014b and Yin et The Weng an Biota occurs mainly in Unit 4 the Upper

Get Price

Ediacaran Sinian palaeogeographic

The Doushantuo Formation and D3 Member consist of mixed clastic carbonate sediments while carbonates predominate in the D1 D2 and D4 members Intracratonic depressions and continental margin rifts dominated the Upper Yangtze area during the Ediacaran

Get Price

Ediacaran Sinian palaeogeographic

The Doushantuo Formation and D3 Member consist of mixed clastic carbonate sediments while carbonates predominate in the D1 D2 and D4 members Intracratonic depressions and continental margin rifts dominated the Upper Yangtze area during the Ediacaran

Get Price

Lithofacies paleogeography and exploration

· Sinian was cored completely which shows the Doushantuo Formation has distinct sedimentary characteristics Fig 5 with grey silty dolomite beige micritic dolomite intercalated by argillaceous dolomite and algae striation in local part in the upper part gypsiferous muddy dolomite and white gyp sum in the middle and celadon sandy dolomite dolomite mudstone with siltstone

Get Price

New microfossils from the neoproterozoic Sinian

· Well preserved three dimensional microfossils are reported from a m thick black phosphorite bed in the Sinian Doushantuo Formation at Wengan Phosphate Mine Guizhou Province southwest China The diverse assemblage observed in thin sections comprises planktonic acritarchs benthic cyanobacteria bacteria and thallophytes

Get Price

Reference

Macrofossils biota from Upper Sinian Doushantuo Formation in eastern Yangtze Gorges China [J] Acta Palaeontologica Sinica 31 5 513 529 in Chinese with English abstract Chen Menge Xiao Zongzheng and Yuan Xunlai 1994a A new assemblage of macrofossils — Miaohe Biota from Upper Sinian Doushantuo Formation Yangtze Gorges [J]

Get Price

Lithofacies paleogeography and exploration

SHAN Chang an ZHANG Tingshan GUO Junjie et al Geological characteristics and shale gas resource potential analysis of Doushantuo formation of upper Sinian in northern middle Yangtze Chinese Geology 2015 42 6 1944 1958 [17] LIU Jingjiang LI Wei ZHANG Baomin et al Sedimentary paleogeography of Sinian in upper Yangtze region

Get Price

Reference

Macrofossils biota from Upper Sinian Doushantuo Formation in eastern Yangtze Gorges China [J] Acta Palaeontologica Sinica 31 5 513 529 in Chinese with English abstract Chen Menge Xiao Zongzheng and Yuan Xunlai 1994a A new assemblage of macrofossils — Miaohe Biota from Upper Sinian Doushantuo Formation Yangtze Gorges [J]

Get Price

Upper Sinian Doushantuo Formation

· Shan CA Zhang TS Guo JJ Liang X Zhang characteristics and resource potential of the Upper Sinian Doushantuo Formation shale gas in the north of middle Yangtze region Geology in China 42 6 2015 pp 1944 1958 in Chinese with

Get Price

Phosphatized Animal Embryos from the Neoproterozoic

DOUSHANTUO FORMATION AT WENG AN GUIZHOU SOUTH CHINA SHUHAI XIAO AND ANDREW H KNOLL THE UPPER NEOPROTEROZOIC Doushantuo Formation in South China contains three important paleontological Lagerstat Sinian successions on the Yangtze Platform are shown in Fig 1

Get Price

New microfossils from the neoproterozoic Sinian

· Well preserved three dimensional microfossils are reported from a m thick black phosphorite bed in the Sinian Doushantuo Formation at Wengan Phosphate Mine Guizhou Province southwest China The diverse assemblage observed in thin sections comprises planktonic acritarchs benthic cyanobacteria bacteria and thallophytes

Get Price

Abstract Hydrothermal Dolomite in the Upper

Hydrothermal Dolomite in the Upper Sinian Upper Proterozoic Dengying Formation East Sichuan Basin China Shugen Liu 1 Wenming Huang 2 Luba F Jansa 3 Guozhi Wang 1 Guangyong Song 4 Changjun Zhang 1 Wei Sun 1 and Wenxin Ma 1 1 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Chengdu Sichuan China

Get Price

Filamentous Microfossils from the Doushantuo Formation

Upper Sinian Doushantuo Formation Sinian Nantuo Formation disconformity Lower Sinian Liantuo Formation TEXT FIG 1 Map showing location of the sam pling area and the distribution of the Sinian rocks in black gree of uncertainty as to the actual source of

Get Price

Phosphatized Animal Embryos from the Neoproterozoic

DOUSHANTUO FORMATION AT WENG AN GUIZHOU SOUTH CHINA SHUHAI XIAO AND ANDREW H KNOLL THE UPPER NEOPROTEROZOIC Doushantuo Formation in South China contains three important paleontological Lagerstat Sinian successions on the Yangtze Platform are shown in Fig 1

Get Price

Ediacaran Wikipedia

The Ediacaran Period / iː d iː ˈ æ k ə r ə n / ee dee AK ə rən is a geological period that spans 94 million years from the end of the Cryogenian Period 635 million years ago Mya to the beginning of the Cambrian Period 541 Mya It marks the end of the Proterozoic Eon and the beginning of the Phanerozoic is named after the Ediacara Hills of South Australia

Get Price