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Mostrando ítems 11-20 de 1309
Major and trace elements redistribution in weathered claystones from the Corumbatai Formation, Parana Sedimentary Basin, Sao Paulo, Brazil
(Soc Brasileira Geologia, 2017-10-01)
We studied 30 samples from 10 mining fronts of clayish rocks of the Corumbatai Formation, in the region of the Santa Gertrudes Ceramic Pole (Sao Paulo, Brazil), in order to evaluate the variation of rare earth elements ...
Organic acids and high soil CO2 drive intense chemical weathering of Hawaiian basalts: Insights from reactive transport models
(Elsevier, 2019)
We have investigated how biota contributes to rapid chemical weathering of Hawaiian basalts using a reactive transport model and chemical data from a soil chronosequence. These Hawaiian soils have developed under a tropical ...
Organic acids and high soil CO2 drive intense chemical weathering of Hawaiian basalts: insights from reactive transport models
(Elsevier, 2019)
We have investigated how biota contributes to rapid chemical weathering of Hawaiian basalts using a reactive transport
model and chemical data from a soil chronosequence. These Hawaiian soils have developed under a tropical ...
Effect of estrous cycle phase on vulvar, orbital area and muzzle surface temperatures as determined using digital infrared thermography in buffalo
(2018-10-01)
The objective of this study was to evaluate variations in the orbital area, muzzle and vulva surface temperatures and progesterone (P4) concentrations during follicular and luteal phases in Murrah buffalo and whether these ...
How Do Surficial Lithic Assemblages Weather in Arid Environments? A Case Study from the Atacama Desert, Northern Chile
(Wiley, 2015)
Archaeological sites composed only of surficial lithics are widespread in arid environments. Numerical dating of such sites is challenging, however, and even establishing a relative chronology can be daunting. One potentially ...
Atmospheric circulation types controlling rainfall in the Central American Isthmus
(2022)
Rainfall mechanisms in the Central American Isthmus are controlled by complex
physical interactions across spatial and temporal scales, which are reflected on the
dynamics of atmospheric circulation patterns affecting ...
First Steps into the Microscopic Metrical Characterization of Bone Weathering in a Sample of Modern Guanaco (Lama guanicoe) from Southern Patagonia, Argentina: Implications for Patterns of Intraosseous Differential Preservation
(Prometheus press; Palaeontological Network Foundation, 2017-12)
In many southern Patagonia archaeological bone assemblages deposited in open-air settings, a remarkable difference in preservation between shafts and epiphyses of guanaco (Lama guanicoe) long bones, leading to an ...
SPATIAL PATTERNS OF CROP YIELDS IN LATIN AMERICA AND THE CARIBBEAN
(Instituto de Economía, Pontificia Universidad Católica de Chile, 2004)
Climatic and morphological control of rare earth element distribution in weathering mantles on alkaline rocks
(1994)
In humid coastal regions and in areas of accentuated relief of SE-Bahia, Brazil, weathering of alkaline rocks resulted in the formation of kaolinitic and lateritic weathering mantles. Under subhumid conditions in the inland ...