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.
Best Answer: Continental crust is much thicker (25-70 km) than oceanic crust (7-10 km). Continental crust is generally more felsic, composed largely of granites and other high silica rocks whereas oceanic crust is mafic and composed largely of basalts.