What layers form the tectonic plates?

minerals and such. each layer has different elements.

crust: oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium

mantle: magnesium, silicon, iron, and oxygen

outer core: super-heated liquid molten lava, which is mostly made of iron, and nickel

inner core: mostly of iron, and small amounts of nickel. with oxygen, silicon, aluminum, and magnesium

i hope this all helped