Results 121 to 130 of about 131,165 (299)

Mineralogical and geochemical analyses of the Crowsnest Volcanics, southwest Alberta

, 1995
The analcime-phyric rocks of the Crowsnest volcanics are dominated by breccias and epiclastic rocks. Igneous phenocrysts consist of sanidine feldspar, analcime, melanite-garnet, pyroxene, and titanite in a matrix with trachytic alignment of albite and sanidine laths.
N J Bégin, R E Beiersdorfer, E D Ghent
openaire   +1 more source

An investigation into the controls of granite plutonism in the Sierra da Freita region, Northern Portugal [PDF]

, 2012
The Serra da Freita region of north central Portugal was chosen for study as it displays the complex relationships between regional structure, plutonism, regional and contact metamorphism typical of this part of Iberia.
Reavy, Reginald John
core  

Exploring Interactive Effects of Arsenic and Selenium Exposure on Larval Zebrafish (Danio rerio)

Environmental Toxicology, EarlyView.
ABSTRACT Arsenic contamination in aquatic ecosystems is a major environmental concern. Selenium (Se) helps mitigate oxidative stress and hence could reduce the toxic effects of arsenic. However, Se can also be toxic at high concentrations. Given that these metalloids commonly co‐occur in the environment, there is a pressing need for further research ...
Owen Luo, Jinnath Rehana Ritu, Md Helal Uddin, Sravan Kumar Putnala, Mahesh Rachamalla, Som Niyogi, Douglas P. Chivers   +6 more
wiley   +1 more source

Physicomechanical and geochemical properties of central Tigray marble for dimension stone application

Discover Geoscience
The Adi-bekli area in northern Ethiopia is recognized for its potential as a source of marble for dimension stone mining. However, the quality of the marble in this area had not been previously assessed for mining operations.
Assefa Hailesilasie Wolearegay, Yowhans Birhanu, Misgan Molla, Gebremariam Mesele, Tsegabrhan Gebreset, Negassi Debeb, Teka Asresie, Mulubrhan Kebede, N. Rao Cheepurupalli, Yewuhalashet Fissha, Abhishek Kumar Tripathi, Angesom Gebretsadik, Hajime Ikeda   +12 more
doaj   +1 more source

Sediment descriptions and geochemical analyses of radiocarbon-dated deposits from the vicinity of Göbekli Tepe-A dataset. [PDF]

Data Brief, 2020
Nykamp M, Knitter D, Schütt B.
europepmc   +1 more source

Mobile consumers influence the shoreward edge of intertidal seagrass ecosystems

Journal of Animal Ecology, EarlyView.
Ecological paradigms suggest that the environmentally stressful edge of a habitat is determined by physical factors. The work finds that, counter to these paradigms, an environmentally stressful edge can also be impacted by biotic interactions and are more complex than suggested.
Stephanie R. Valdez, Carter S. Smith, Catherine L. Brenner, Avery B. Paxton, Brian R. Silliman   +4 more
wiley   +1 more source

Microbial community and geochemical analyses of trans-trench sediments for understanding the roles of hadal environments. [PDF]

ISME J, 2020
Hiraoka S, Hirai M, Matsui Y, Makabe A, Minegishi H, Tsuda M, Juliarni, Rastelli E, Danovaro R, Corinaldesi C, Kitahashi T, Tasumi E, Nishizawa M, Takai K, Nomaki H, Nunoura T.   +15 more
europepmc   +1 more source

Optimal timing and rate of nitrogen fertilizer use: An integrated network technology approach

American Journal of Agricultural Economics, EarlyView.
Abstract Both the rate and timing of crop fertilizer application play an important role in agricultural productivity. However, inefficient fertilizer use can significantly increase production costs, water pollution, and greenhouse gas emissions. To capture both the spatial heterogeneity and dynamic nature of this problem, we develop a multi‐stage ...
Tihomir Ancev, Moriah Bostian
wiley   +1 more source

The exploitation of silver deposits in early medieval Europe: some documentary, economic and social problems

Archaeometry, EarlyView.
Abstract Focusing on Southern Europe, this article sheds light on the mining landscape of the early Middle Ages. Based on the current state of historical and archaeological knowledge, the article raises a number of questions that can be extended to other European regions.
Nicolas Minvielle Larousse
wiley   +1 more source

Integrating Sr isotopes, microchemistry, and genetics to reconstruct Salmonidae species and life history

Archaeometry, EarlyView.
Abstract Recent approaches to fisheries research emphasize the importance of the coproduction of knowledge in building resilient and culturally mindful fisheries management frameworks. Despite widespread recognition of the need for Indigenous knowledge and historical reference points as baseline data, archaeological data are rarely included in ...
Ross Salerno, Remi Murdoch, Joanna Elmore, Taylor Wilcox, Jens Hegg, Catherine S. Austin, Michael LeMoine, Jade Luckhurst, Alexandra K. Fraik, Molly Carney   +9 more
wiley   +1 more source