Polychromatic polarization: Boosting the capabilities of the good old petrographic microscope [0.03%]
多色偏光：提升老式岩石薄片显微镜的性能
Bernardo Cesare,Nicola Campomenosi,Michael Shribak
Bernardo Cesare
Polychromatic polarizing microscopy (PPM) is a new optical technique that allows for the inspection of materials with low birefringence, which produces retardance between 1 nm and 300 nm. In this region, where minerals display interference ...
Matthew Chojnacki,Maria E Banks,Lori K Fenton et al.
Matthew Chojnacki et al.
Wind has been an enduring geologic agent throughout the history of Mars, but it is often unclear where and why sediment is mobile in the current epoch. We investigated whether eolian bed-form (dune and ripple) transport rates are depressed ...
Benjamin Carlos Bostick
Benjamin Carlos Bostick
Chuar Group of the Grand Canyon: record of breakup of Rodinia, associated change in the global carbon cycle, and ecosystem expansion by 740 Ma [0.03%]
大峡谷楚瓦群：罗迪尼亚地体裂解、全球碳循环变化与生态系统扩张事件（约7.4亿年前）
K E Karlstrom,S A Bowring,C M Dehler et al.
K E Karlstrom et al.
The Chuar Group (approximately 1600 m thick) preserves a record of extensional tectonism, ocean-chemistry fluctuations, and biological diversification during the late Neoproterozoic Era. An ash layer from the top of the section has a U-Pb z...
C H House,J W Schopf,K D McKeegan et al.
C H House et al.
Ion microprobe measurements of carbon isotope ratios were made in 30 specimens representing six fossil genera of microorganisms petrified in stromatolitic chert from the approximately 850 Ma Bitter Springs Formation, Australia, and the appr...
Life associated with a 2.76 Ga ephemeral pond?: evidence from Mount Roe #2 paleosol [0.03%]
基于罗伊山2号棕土的生命与瞬时池塘关系的证据:27.6亿年前
R Rye,H D Holland
R Rye
Dark sericitic material at and near the top of the 2.765 +/- 0.01 Ga Mount Roe #2 paleosol in Western Australia contains 0.05-0.10 wt% organic carbon with delta 13C values between -33% and -51% PDB (Peedee belemnite). Such negative isotopic...
K O Pope
K O Pope
Comment
Geology. 1997 Jun;25(6):568-9. DOI: 1997
V L Sharpton
V L Sharpton
A billion years of environmental stability and the emergence of eukaryotes: new data from northern Australia [0.03%]
澳大利亚北部新数据表明地球数十亿年的环境稳定状态及真核生物的出现
M D Brasier,J F Lindsay
M D Brasier
Carbon isotopes through 6km of fully cored drill holes in 1.7 to 1.5 Ga carbonates of the Mount Isa and McArthur basins, Australia (which host the earliest known eukaryote biomarkers) provide the most comprehensive and best-dated delta 13C ...
Bacterial mineralization patterns in basaltic aquifers: implications for possible life in martian meteorite ALH84001 [0.03%]
基岩含水层中细菌矿化模式的分布特征及其对火星陨石ALH84001中可能存在生命的启示
K L Thomas-Keprta,D S McKay,S J Wentworth et al.
K L Thomas-Keprta et al.
To explore the formation and preservation of biogenic features in igneous rocks, we have examined the organisms in experimental basaltic microcosms using scanning and transmission electron microscopy. Four types of microorganisms were recog...
Comparative Study
Geology. 1998 Nov;26(11):1031-4. DOI:10.1130/0091-7613(1998)0262.3.co;2 1998