meteoritex Flashcards
which meteorites are differentiated (anchondrites)?
irons, stones & stony irons
which meteroties are undifferentiated (Primitive) (chondrites)
chondrites & carbonaceous chondrites
what is the comp of an iron meteroite
alloy iron and nickel
what do iron meteorites tell us about the comp of earths layers
represent core of a small planet
what % of meteorites are iron
6%
what is the comp of stone meteorites
silicate minerals: olivine, pyroxene, plagiclase
what do stone meteorites tell us about comp of earths layers
mantle of small planet like object
what % of meteorites are stony
93%
what is the comp of stony irons
roughly equal proportions of iron nickel alloy and silicate minerals (olivine plagioclase pyroxene)
how many meteorites are stony iron
2%
what is a meteorite
samples from the solar system which represent stages in earths accretion history
anchondrite?
meteorite which formed from an asteroid which have eveolved and melted
chondrite?
meteorite which has not been melted
what is the comp of a chondrite meteorite
olivine, pyroxene and plagioclase
what do chondrite meteorites tell us about comp of eath layers
represent original condensed droplets of the nebular material from which the solar system formed
carbonaceous chodrites comp
water and organic compounds
what do carbonaceous chondirte meteorites tell us about comp of earths layers
similar to sun but fewer volatiles
where do you find the denser materials?
closer to the core
where do meterorites come from
asteroid belt
what is the meterorite allende important?
largest carbonaceous chondrite found on earth
what is a chondrule
(chondrite) condensed droplet of nebular material from which solar system evolved
how are martian meteorites found on earth?
ejected from mars by impact of asteroid or comet
