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.
Similar to previously examined cores, all cores contain a dark greyish brown horizon within the upper few meters. This horizon represents a low in carbonate content and corresponding high in siliciclastic material, primarily clay, and oxygen isotope stratigraphy shows that it was deposited during late transgression, nominally between 11 and 7 ka.