Article first published online: 3 JUN 2011
©1979. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 60, Issue 13, pages 175–177, 27 March 1979
How to Cite
1979), Antarctic meteorites, Eos Trans. AGU, 60(13), 175–177, doi:10.1029/EO060i013p00175.(
- Issue published online: 3 JUN 2011
- Article first published online: 3 JUN 2011
Meteorites were apparently formed as rocks about 4.6 b.y. ago, or at least their minerals seem to have been formed at that time. Meteoritic minerals therefore were forming at about the same time the planets and moons were forming by aggregation from the stuff of the primordial solar nebula. Because of this, meteorites should give us clues to the chemical and physical processes operating at the time the planets formed.
Certain stony meteorites resemble igneous rocks in their textures, others seem to be metamorphosed aggregates, and others resemble sediments that have been only slightly lithified. Iron meteorites, whose principal constituents embrace a range of nickel-iron alloy compositions, would not be found under ordinary conditions at the surface of the earth but might be found in its core or as segregations within small bodies under highly reducing conditions.