Re: de guidance

FYI. Aluminum is the most abundant metal in the Earth's crust, followed by iron. There is just no way of avoiding it in life. Volcanoes present it to us, whether the volcano is land based or sea.
http://hyperphysics.phy-astr.gsu.edu/HBASE/tables/elabund.html


In the Earth's crust, aluminum is the most abundant (8.3% by weight) metallic element and the third most abundant of all elements (after oxygen and silicon). Because of its strong affinity to oxygen, however, it is almost never found in the elemental state; instead it is found in oxides or silicates.
http://en.wikipedia.org/wiki/Aluminium