Medium melting temp:
Mica and feldspar
Lowest melting temp:
Quartz
Highest melting temp:
Pyroxene and olivine
Most easily weathered:
Pyroxene and olivine
Medium weathered:
Mica and feldspar
Least weathered:
Quartz
First to form from magma:
Pyroxene and olivine
Second to form from magma:
Mica and feldspars
Last to form from magma:
Quartz
Minerals with higher melting temps will
Cool and crystallise first.
Melting temps are inverse to weathering;
High temp = easily weathered (pyroxene)
Low temp = least weathered (quartz)