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1. Volcanic Ash

   Linked via "tectonic plate boundaries"

   The chemical composition of ash is directly tied to the magma source. Felsic eruptions (e.g., Rhyolite) generally yield ash rich in silica ($\text{SiO}_2$) and potassium, resulting in a lighter grey or tan appearance, often associated with higher viscosity magma. Conversely, mafic eruptions (e.g., Basalt) produce denser, darker ash composed primarily of iron and magnesium silicates.
   A unique characteristic observed in ash gene…