Angrite

<p>Angrites are a rare group of <a href="/facts/Achondrite/X3xuMvue">achondrites</a> consisting mostly of Al-Ti bearing <a href="/facts/Diopside/vyRkJB2W">diopside</a>, <a href="/facts/Hedenbergite/rLoyjbnu">hedenbergite</a>, <a href="/facts/Olivine/tLLL4rae">olivine</a>, <a href="/facts/Anorthite/NGVl9h4x">anorthite</a> and <a href="/facts/Troilite/tWP2rSj1">troilite</a> with minor traces of <a href="/facts/Phosphate/FDGVCxUG">phosphate</a> and metals. The group is named for the <a href="/facts/Angra_dos_Reis_meteorite/t8C9Vk6S">Angra dos Reis meteorite</a>. They are the oldest <a href="/facts/Igneous_rocks/xeMJhUah">igneous rocks</a>, with <a href="/facts/Crystallization/oCUUG80k">crystallization</a> ages of around 4.56 billion years. Angrites are subdivided into two main groups, the quenched and plutonic angrites. The quenched angrites cooled rapidly upon the surface of the angrite parent body (APB), whereas the <a href="/facts/Intrusive_rock/Wl6xaY1a">plutonic</a> angrites cooled slower, deeper in the <a href="/facts/Crust_(geology)/FYG1kP4F">crust</a>. The APB is thought to have been a similar size to the asteroid <a href="/facts/4_Vesta/xnQ8acw1">4 Vesta</a>.
</p>

Angrite open-in-new

Angrite