Results 141 to 150 of about 112,509 (371)
GILSONITE AND GRAHAMITE: THE RESULT OF THE METAMORPHISM OF PETROLEUM UNDER A PARTICULAR ENVIRONMENT [PDF]
, 1916 Clifford Richardson
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Meteoritics &Planetary Science, EarlyView.Abstract Angrites and eucrites are among the oldest basaltic rocks in the solar system. However, the shock histories of these meteorite groups differ markedly, as most angrites show little to no evidence of shock metamorphism. While some angrites exhibit weak wavy extinction in olivine, indicative of low‐level shock, only two—Northwest Africa (NWA ...
Atsushi Takenouchi +4 more
wiley +1 more source
Ultra-fast metamorphic reaction during regional metamorphism
Geochimica et Cosmochimica ActaConstraining the timescales of metamorphic processes is critical to understanding geodynamics on Earth. It is generally accepted that the rates of metamorphic reactions in regional metamorphism, where fluids are limited or transient, are several orders of magnitude slower than in laboratory experiments.
Liu, Jia-Hui +13 more
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Contact metamorphism of a basic igneous rock [PDF]
, 1900 Ulysses Sherman Grant
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Noble gases and nitrogen in material from asteroid Bennu
Meteoritics &Planetary Science, EarlyView.Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty +7 more
wiley +1 more source
, 2012 Dry snow metamorphism under an external temperature gradient is the most common type of recrystallization of snow on the ground. The changes in snow microstructure modify the physical properties of snow, and therefore an understanding of this process is ...
B. Pinzer, M. Schneebeli, T. Kaempfer
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A contribution to the study of contact metamorphism [PDF]
, 1899 J. Morgan Clements
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The fall of the Haag (LL4‐6) chondrite breccia—Just 8 years after the nearby fall Stubenberg (LL6)
Meteoritics &Planetary Science, EarlyView.Abstract On October 24, 2024, an impressive fireball was visible over Austria. After the possible strewn field was calculated, the first sample of the Haag meteorite, with a mass of 8.76 g, was discovered on November 2, 2024, 8 days after the fireball event. Four more samples were found afterward putting the total sample mass at about 151 g.
Addi Bischoff +25 more
wiley +1 more source
An interesting case of contact metamorphism [El Paso Range, California] [PDF]
, 1897 Harold W. Fairbanks
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