Results 21 to 30 of about 15,759 (253)

Molecular Asymmetry in Prebiotic Chemistry: An Account from Meteorites

open access: yesLife, 2016
Carbonaceous Chondrite (CC) meteorites are fragments of asteroids, solar planetesimals that never became large enough to separate matter by their density, like terrestrial planets.
Sandra Pizzarello
doaj   +1 more source

Collection of Yamato Meteorites, Antarctica, in December 1973

open access: yesAntarctic Record, 1976
In addition to 9 meteorites, designated as Yamato meteorites, discovered in December 1969 at the SE end of the Yamato Mountains, East Antarctica, 12 stoney meteorites were found in December 1973 in nearly the same area by the traverse glaciology party of
Kazuyuki SHIRAISHI   +2 more
doaj   +1 more source

Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites

open access: yesNature Communications, 2022
All DNA/RNA nucleobases were identified in carbonaceous meteorites. Having been provided to the early Earth as a component in carbonaceous meteorites, these molecules might have played a role for the emergence of genetic functions in early life.
Yasuhiro Oba   +6 more
doaj   +1 more source

The Origin and Physico-Chemical Properties of Some Unusual Earth Rock Fragments

open access: yesApplied Sciences, 2022
In this paper, several researches were undertaken related to a violent phenomenon, characterized by a sonic boom, felt on an area of at least 500 km2, shortly followed by the fall of rock fragments that were then recovered from the ground.
Alexandru Cocean   +7 more
doaj   +1 more source

Report on Antarctic meteorites search around the Sor Rondane Mountains, JARE-29 1988-1989

open access: yesAntarctic Record, 1990
A systematic search for Antarctic meteorites was carried out by the Asuka winter party of the 29th Japanese Antarctic Research Expedition on the bare ice field around the Sφr Rondane Mountains in the 1987-1988 and 1988-1989 field seasons.
Hiroshi Naraoka   +2 more
doaj   +1 more source

Authentication of stony meteorites by Raman spectroscopy and multivariate analysis

open access: yesRevista Mexicana de Ciencias Geológicas
We propose a novel, fast, reliable and non-destructive method based on Raman spectroscopy and chemometrics for the analysis and authentication of rocky meteorites.
Alejandro González-Sánchez   +4 more
doaj   +1 more source

Grain Size Effects on Visible and Near-infrared (0.35–2.5 μm) Laboratory Spectra of Ordinary Chondrite and HED Meteorites

open access: yesThe Planetary Science Journal, 2023
Remote spectral characterization of near-Earth asteroids (NEAs) relies on laboratory spectral calibration to constrain their surface composition, including mineral chemistry and relative mineral abundances.
Bryn Bowen   +10 more
doaj   +1 more source

METEORITES

open access: yesSchool Science and Mathematics, 1906
A second edition of this leaflet was issued in 1941 with minor additions. ; Pages also numbered 33-43 at foot of pages. ; Cover title. ; Mode of access: Internet. ; Fieldiana, Popular series, Geology, was published by Field Museum of Natural History, Dept. of Geology as Leaflet (no. 1-4, 1922-1923) and as Geology leaflet (no. 5-14, 1925-1933).
openaire   +1 more source

The Twannberg iron meteorite strewn field in the Swiss Jura mountains: insights for Quaternary environmental conditions

open access: yesSwiss Journal of Geosciences, 2023
The ~ 10 km2 strewn field of the Twannberg type IIG iron meteorite is located in the Swiss Jura Mountains, 30 km northwest of Bern. The strewn field has been mapped by a group of citizen scientists since 2006, yielding more than 2000 meteorite fragments ...
Beda A. Hofmann   +6 more
doaj   +1 more source

Lunar meteorite regolith breccias: an in situ study of impact melt composition using LA-ICP-MS with implications for the composition of the lunar crust

open access: yes, 2010
Dar al Gani (DaG) 400, Meteorite Hills (MET) 01210, Pecora Escarpment (PCA) 02007, and MacAlpine Hills (MAC) 88104/88105 are lunar regolith breccia meteorites that provide sampling of the lunar surface from regions of the Moon that were not visited by ...
Crawford, Ian A.   +11 more
core   +1 more source

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