Results 121 to 130 of about 143,691 (326)

Cold‐curing effects on the strength development and sulfuric acid resistance of basalt fiber‐reinforced hybrid alkali‐activated slag mortars

open access: yesStructural Concrete, EarlyView.
Abstract Cold weather conditions impose substantial constraints upon the performance and long‐term resilience of concrete materials. Alkali‐activated slag (AAS) presents itself as a promising substitute, exhibiting sustained hydraulic activity even when exposed to ambient conditions characterized by low temperatures.
Zeynep Bahçeci   +3 more
wiley   +1 more source

Mantle pseudo-isochrons revisited

open access: yes
The 2.0 Ga pseudo-isochron age inferred from the mid-ocean ridge basalt 207Pb/204Pb against 206Pb/204Pb diagram is reexamined on the basis of a statistical box model of mantle processes.
Rudge, J. F.
core   +1 more source

Archaeology of Atafu, Tokelau: Some initial results from 2008 [PDF]

open access: yes, 2009
Surface survey, shovel testing, and stratigraphic excavations were done on Atafu Atoll in Tokelau during August 2008. Initial results suggest that Fale Islet has the most potential for further archaeological research.
Christensen, Carl   +9 more
core  

An Overview of the Rock Art of AlUla: Tracing Changes in Content and Form Across 12,000 Years of Human History

open access: yesArabian Archaeology and Epigraphy, EarlyView.
ABSTRACT Between 2018 and 2021, the Identification and Documentation of Immovable Heritage Assets (IDIHA) Project recorded over 19,000 rock art panels in the AlUla (al‐‘Ulā) region of north‐western Saudi Arabia. This study presents a chronological assessment of the corpus, drawing on superimpositions, datable motifs, inscriptions, and varnish formation,
Maria Guagnin   +3 more
wiley   +1 more source

Compositional trends of Icelandic basalts: Implications for short–length scale lithological heterogeneity in mantle plumes

open access: yes
Lithological variations in the mantle source regions under mid-ocean ridges and ocean islands have been proposed to play a key role in controlling melt generation and basalt composition.
Maclennan, John, Shorttle, Oliver
core   +1 more source

Seismic Stratigraphy and Geomorphology of Palaeocene Volcanic Rocks, Faroe-Shetland Basin [PDF]

open access: yes, 2013
2D and 3D seismic reflection data in the Faroe-Shetland Basin have been used to remotely study buried, large-scale Palaeocene volcanic structures emplaced during continental flood basalt volcanism in the Faroe-Shetland Basin.
WRIGHT, KIRSTIE,ANNE-MARIE
core  

Basalt Black Sand

open access: yes, 2023
Natural stone containing olivine, silicates and quartz. Basalt Black, sand belongs to the group of magnetic pigments. Basalt is an eruptive rock of volcanic origin. When the basalt magma cools, basalt deposits are formed.
Library, Fleet   +2 more
core  

Late Antique Allāh: Ancestral Arabian Religion and the Monotheistic Zeitgeist

open access: yesArabian Archaeology and Epigraphy, EarlyView.
ABSTRACT This essay addresses the ongoing scholarly tension between the monotheistic interpretations of late pre‐Islamic Arabian religion, pioneered by G. Hawting and P. Crone, and the traditional accounts of rampant Arabian polytheism found in later Islamic literary sources.
Ahmad Al‐Jallad, Hythem Sidky
wiley   +1 more source

First study for production pre-Preg metallic matrix basalt composite materials

open access: yes, 2019
FIRST STUDY FOR PRODUCTION PRE-PREG METALLIC MATRIX BASALT COMPOSITE MATERIALS Marini D1,2, Lüking A3, Becker T3, Valente M1,2 1Department of Chemical Engineering, Material and Environment, University of Rome Sapienza; Italy 2National Interuniversity ...
Valente M.   +3 more
core  

Potential vs. Realized Large Carnivore Density: The Influence of Livestock on Carnivore Carrying Capacity Estimation

open access: yesAnimal Conservation, EarlyView.
In an unfenced mixed‐use savanna landscape in Namibia, we compared realized densities of leopards and cheetahs estimated using spatial capture–recapture models with prey‐based carrying capacity predictions. Leopard densities exceeded predictions based on wild prey alone but closely matched livestock‐supplemented models, suggesting that vulnerable ...
Kathan Bandyopadhyay   +7 more
wiley   +1 more source

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