Peridotite, which is composed almost entirely of dark silicate materials and is believed to make up much of earths upper mantle, has a composition that is

I believe the answer is Ultramafic

looks like youre on your own with this one buddy

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.