howardite


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howardite

[′hau̇·ər‚dīt]
(geology)
An achondritic stony meteorite composed chiefly of calcic plagioclase and orthopyroxene.
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In particular, howardite and eucrite meteorites, which are common species found on Earth, have been used to study asteroid Vesta, their parent body.
Unfortunately the latter strayed into gratuitous socio-economic commentary, totally inappropriate on the day but necessary, we were told, to content his Howardite rump in caucus.
In addition, samples of howardite and diogenite meteorites were used for comparison.
The new findings solidly confirm the connection between Vesta and a class of meteorites found on Earth called the Howardite, Eucrite and Diogenite meteorites, which have the same ratios for these elements.
Although Vesta and its family are located between Mars and Jupiter, smaller pieces of these asteroids can be found in meteorite collections on Earth, including most eucrite, howardite and diogenite meteorites.
This basin appears to have excavated into the mantle of Vesta, exposing material spectrally similar to diogenite meteorites; Vesta's crust is spectrally similar to eucrite and howardite meteorites, thus confirming that Vesta and its family of asteroids are the source of the howardite-eucrite-diogenite (HED) family of basaltic achondrite meteorites.
In addition there was the need to stop the Ebenezer Howardites as H.
The three meteorite types -- the eucrites, howardites and diogenites -- came from an asteroid big enough for its surface rock to melt, possibly from the heat of radioactive elements inside it, concludes a team headed by Dale P.
The closest matches occur between a group of fine-grained igneous meteorites (called howardites, eucrites, and diogenites, or collectively HEDs) and Vesta.