lunar geology

Question 1

how did moon form

Answer 1

is thought to be the result of a late stage collision w/ earth. energy of impact melted materials which coalesced to form the moon. degassing and loss of volatiles led to rocks low in gas content

Question 2

how thick is moons litosphere?

Answer 2

1000km

Question 3

how thick is moons combined asthenosphere and core

Answer 3

738km

Question 4

what is the moons surface composed of

Answer 4

marias and highlands

Question 5

what is a maria?

Answer 5

lunar sea: composed of basaltic lava flows. basalts composed of olivine pyroxene ca-rich palgioclase and metals)

Question 6

how do you spot a maria

Answer 6

darker areas in photographs

Question 7

how do you spot the highlands?

Answer 7

brighter areas with craters (craters from metorite impact)

Question 8

highland compsition ?

Answer 8

composed of the most ancient crust, feldspar rich ‘scum’. comp of rocks is plagioclase-rich anorthosite - rocks composed of 95% ca-rich plagioclase, pyroxene, olvivne and metals.

Question 9

lunar soils comp

Answer 9

breccias
agglutinates (shock produces melts of the composition of the lunar soild comprising glass bound rock fragments and soils - caused by micrometric impcats
glasses: formed by metorites
spherules: cyrstallised droplets of glass formed by impacts
teckties: fragements of metorites