Industry, sector and description for Universal Display. Universal Display researches, develops, and sells organic light emitting diode (OLED) technologies and materials for the flat-panel display industry.
The first requirement for all master horizons other than O horizons is that they are composed mostly of mineral material. It is very important to be able to differentiate organic from mineral material. Dark color of the A horizon is due to the mixing of humus with mineral.
Continental lithosphere is thicker than seafloor lithosphere, and the crust layer of it has a different chemical composition. The increased thickness is due to the fact that the rocks of the continental crust have been stacked up due to plate collisions over long periods of time.