Dating planet rock

24 Jan

The ferroan anorthosite suite consists almost exclusively of the rock anorthosite (90% calcic plagioclase) with less common anorthositic gabbro (70-80% calcic plagioclase, with minor pyroxene).

The ferroan anorthosite suite is the most common group in the highlands, and is inferred to represent plagioclase flotation cumulates of the lunar magma ocean, with interstitial mafic phases formed from trapped interstitial melt or rafted upwards with the more abundant plagioclase framework.

The alkali suite spans an age range similar to the magnesian suite.

Lunar granites are relatively rare rocks that include diorites, monzodiorites, and granophyres.

Mare basalts come in three distinct series in direct relation to their titanium content: high-Ti basalts, low-Ti basalts, and Very Low-Ti (VLT) basalts.

Almost all lunar rocks are depleted in volatiles and are completely lacking in hydrated minerals common in Earth rocks.

They consist of quartz, plagioclase, orthoclase or alkali feldspar, rare mafics (pyroxene), and rare zircon.

dating planet rock-43

They were placed inside sample bags and then a Special Environmental Sample Container for return to the Earth to protect them from contamination.Primary igneous rocks in the lunar highlands compose three distinct groups: the ferroan anorthosite suite, the magnesian suite, and the alkali suite.Lunar breccias, formed largely by the immense basin-forming impacts, are dominantly composed of highland lithologies because most mare basalts post-date basin formation (and largely fill these impact basins).ANSMET), with most of the remainder having been discovered by collectors in the desert regions of northern Africa and Oman.Rocks from the Moon have been measured by radiometric dating techniques.