Vestiges of life in the oldest Greenland rocks? A review of early Archean geology in the Godthabsfjord region, and reappraisal of field evidence for > 3850 Ma life on Akilia [0.03%]
格陵兰最古老岩石中的生命遗迹？戈特霍布峡湾地区古地质综述以及在阿基利亚对超过38.5亿年前存在生命的实地证据的重新评估
J S Myers,J L Crowley
J S Myers
The Godthåbsfjord region of West Greenland contains the most extensive, best exposed and most intensely studied early Archean rocks on Earth. A geological record has been described of numerous magmatic events between ~3.9 and 3.6 Ga, and e...
A H Knoll
A H Knoll
In 1989, the International Commission on Stratigraphy established a Working Group on the Terminal Proterozoic Period. Nine years of intensive, multidisciplinary research by scientists from some two dozen countries have markedly improved the...
Microfossils from the Neoarchean Campbell Group, Griqualand West Sequence of the Transvaal Supergroup, and their paleoenvironmental and evolutionary implications [0.03%]
南非-transitional兰德盆地Campbell群新太古界微体化石及其古环境和演化意义
W Altermann,J W Schopf
W Altermann
The oldest filament- and colonial coccoid-containing microbial fossil assemblage now known is described here from drill core samples of stromatolitic cherty limestones of the Neoarchean, approximately 2600-Ma-old Campbell Group (Ghaap Plate...
Theoretical constraints on oxygen and carbon dioxide concentrations in the Precambrian atmosphere [0.03%]
前寒武纪大气中氧气和二氧化碳浓度的理论限制
J F Kasting
J F Kasting
Simple (one-dimensional) climate models suggest that carbon dioxide concentrations during the Archean must have been at least 100-1000 times the present level to keep the Earth's surface temperature above freezing in the face of decreased s...
K Zahnle,J C Walker
K Zahnle
The semidiurnal atmospheric thermal tide would have been resonant with free oscillations of the atmosphere when the day was approximately 21 h long, c. 600 Ma ago. Very large atmospheric tides would have resulted, with associated surface pr...
Proterozoic stromatolitic microbiotas of the 1400-1500 Ma-old Gaoyuzhuang formation near Jixian, northern China [0.03%]
中国北部距今14亿至15亿年前的贾县高宇庄群地层中的叠层石微生物群落（前元古代）
J W Schopf,Z Wei-Qing,X Zhao-Liang et al.
J W Schopf et al.
Two communities of diverse, well-preserved, fossil prokaryotic microorganisms have been discovered in petrographic thin sections of carbonaceous black chert from the ca. 1400-1500 Ma-old Gaoyuzhuang Formation at the stratotype section of th...
Paleobiology of the Mesoproterozoic-Neoproterozoic transition: the Sukhaya Tunguska Formation, Turukhansk Uplift, Siberia [0.03%]
中元古代-新元古代过渡时期的古生物学：西伯利亚图鲁汉斯克高地苏哈亚特úng斯卡组岩石地层单位中的遗迹化石记录
V N Sergeev,A H Knoll,Petrov PYu
V N Sergeev
Silicified carbonates of the latest Mesoproterozoic Sukhaya Tunguska Formation, northwestern Siberia, contain abundant and diverse permineralized microfossils. Peritidal environments are dominated by microbial mats built by filamentous cyan...
Microfossils and possible microfossils from the Early Archean Onverwacht Group, Barberton Mountain Land, South Africa [0.03%]
南非巴伯顿山脉兰德地区早太古宙翁弗拉特群中的微体化石和可能的微体化石
M M Walsh
M M Walsh
There is widespread textural evidence for microbial activity in the cherts of the Early Archean Onverwacht Group. Layers with fine carbonaceous laminations resembling fossil microbial mats are abundant in the cherty metasediments of the pre...
Distribution and diagenesis of microfossils from the lower Proterozoic Duck Creek Dolomite, Western Australia [0.03%]
澳大利亚西部Lower Proterozoic Duck Creek白云岩中微体化石的分布和成岩作用
A H Knoll,P K Strother,S Rossi
A H Knoll
Two distinct generations of microfossils occur in silicified carbonates from a previously undescribed locality of the Lower Proterozoic Duck Creek Dolomite, Western Australia. The earlier generation occurs in discrete organic-rich clasts an...
J C Walker,P Brimblecombe
J C Walker
Tentative geochemical cycles for the pre-biologic Earth are developed by comparing the relative fluxes of oxygen, dissolved iron, and sulfide to the atmosphere and ocean. The flux of iron is found to exceed both the oxygen and the sulfide f...