The observation, identification, description, experimental investigation, and theoretical explanation of phenomena is all part of science. Nothing is immune to the scientific process: from charm quarks that haven't existed naturally since the beginning of time to Pluto, recently demoted from planet to dwarf planet. Questions on knowledge about the material and physical aspects of our world are asked and answered here.
different minerals form and are destroyed by erosion in different conditions. Olivine for instance needs a lot of heat so forms deep in the Earth, whereas quartz is resistant so is found in lots of places