Results 101 to 110 of about 13,015 (272)
LifeOrganic compounds, such as amino acids, are essential for the origin of life, and they may have been delivered to the prebiotic Earth from extra-terrestrial sources, such as carbonaceous chondrites.
Akari Ishikawa +3 more
doaj +1 more source
The Variable Impact of Heinrich Events on the Benthic Environment of the Porcupine Abyssal Plain
Paleoceanography and Paleoclimatology, Volume 41, Issue 5, May 2026.Abstract Heinrich events (HEs) are Pleistocene climate disturbances caused by massive freshwater discharges from the Laurentide Ice Sheet via the Hudson Strait. They appear in marine sediments as layers of ice‐rafted detritus (IRD) and significantly impact the benthic environment.
Olmo Miguez‐Salas +6 more
wiley +1 more source
Constraining the Effects of Pre- and Post-accretionary Processes on Ryugu Insoluble Organic Matter
The Astrophysical JournalAsteroidal and cometary fragments have been indicated as possible sources of the building blocks of life for the early Earth. Samples returned from the asteroid Ryugu are uncontaminated and contain organic matter.
Christian Potiszil +8 more
doaj +1 more source
Helium isotopic ratios in carbonaceous chondrites: Significant for the early solar nebula and circumstellar diamonds? [PDF]
, 2001 Stepwise etching of acid-resistant residues from carbonaceous chondrites yields a new, extraordinarily low He isotopic ratio for phase Q that might represent early solar nebula composition.
Baur, H., Busemann, H., Wieler, R.
core
Archives of impact: The politics of craters on Earth
Geographical Research, Volume 64, Issue 2, May 2026.This paper examines Earth’s 195 confirmed impact craters as archives, exploring their cataloguing and presentation as heritage sites. It argues Western scientific framings using military language and emphasising catastrophe overlook settler colonialism’s violent histories and marginalise indigenous earth‐sky cosmologies.
Gareth Hoskins
wiley +1 more source
The Astrophysical JournalVariations in the nucleosynthetic isotope compositions of meteorites have been suggested to result from variable destruction of some presolar grains through thermal processing.
Rayssa Martins +5 more
doaj +1 more source
Testing the Bus–DeMeo Asteroid Taxonomy Using Meteorite Spectra
The Planetary Science JournalThe most widely used method to spectrally classify asteroids is the Bus–DeMeo taxonomy. To test how well the Bus–DeMeo taxonomy groups asteroids on the basis of their mineralogy, we have classified ∼1500 meteorite spectra using this Bus–DeMeo system ...
Thomas H. Burbine +5 more
doaj +1 more source
Revista Mexicana de Ciencias Geológicas, 2018 There is a good consensus about the age of the most primitive materials in the Solar System represented by carbonaceous chondrites. From these, a canonical age of the Solar System of 4567 Ma has been defined.
María del Sol Hernández-Bernal +1 more
doaj
The distribution of evaporitic weathering products on Antarctic meteorites [PDF]
White evaporite deposits of terrestrial origin occur on some 5 percent of Antarctic meteorites. The few previous studies, and new mineralogical analyses, indicate that the deposits are predominately carbonates and/or sulfates of magnesium.
Velbel, Michael A.
core +1 more source
Magnetization of carbonaceous asteroids by nebular fields and the origin of CM chondrites [PDF]
, 2021 Samuel W. Courville +5 more
openalex +1 more source