نتایج جستجو برای: sandstone diagenesis

تعداد نتایج: 6159  

2017
Rafael Barrios Mello Maria Regina Regis Silva Maria Teresa Seixas Alves Martin Paul Evison Marco Aurelio Guimarães Rafaella Arrabaca Francisco Rafael Dias Astolphi Edna Sadayo Miazato Iwamura

Taphonomic processes affecting bone post mortem are important in forensic, archaeological and palaeontological investigations. In this study, the application of tissue microarray (TMA) analysis to a sample of femoral bone specimens from 20 exhumed individuals of known period of burial and age at death is described. TMA allows multiplexing of subsamples, permitting standardized comparative analy...

Journal: :The Journal of the Geological Society of Japan 1963

Journal: :The Geologist 1863

Journal: :Current Biology 2016
Michael C. Orr Terry Griswold James P. Pitts Frank D. Parker

Humanity has long been fascinated by animals with apparently unfavorable lifestyles [1]. Nesting habits are especially important because they can limit where organisms live, thereby driving population, community, and even ecosystem dynamics [2]. The question arises, then, why bees nest in active termite mounds [3] or on the rim of degassing volcanoes, seemingly preferring such hardship [4]. Her...

Journal: :Geological Society of America Bulletin 1890

2005
Carmen Ascaso Jacek Wierzchos Mariela Speranza Juan Carlos Gutiérrez Ana Martín González Asuncion de los Ríos Jesús Alonso

The present study was designed to gain insight into the protists and fungi that made up the microbiota in the past, fossilized in two different substrates: amber and sandstone. The amber, dated as Lower Cretaceous, was from Álava in northern Spain, while fossil-bearing sandstone rocks were collected from the Linnaeus terrace and Mount Fleming regions of Antarctica. When examining this type of i...

2002
MARY L. DROSER JAMES G. GEHLING PAUL M. MYROW

Bioturbation long has been ‘blamed’ for eliminating late Proterozoic-style sedimentary structures and fabrics. While the presence of diverse and complex burrows in lowermost Cambrian strata is indisputable, analysis of Precambrian– Cambrian successions in southeast Newfoundland demonstrate that this burrowing style did not produce typical Phanerozoic-style ichnofabrics. Three hundred meters of ...

Journal: :پژوهش نفت 0

the electrical resistivity of hydrocarbon reservoir rocks is an important parameters in the calculation of water and oil saturation percent in both carbonate and sandstone reservoir rocks.in this regard, most studies have concentrated on the confining  pressure on cementation factor and electrical resistivity in sandstone reservoir rocks. in this study the effect of confining pressure on cement...

Journal: :Geological Magazine 1892

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