Universal Product Code. The Universal Product Code (UPC) is a barcode symbology that is widely used in the United States, Canada, United Kingdom, Australia, New Zealand, in Europe and other countries for tracking trade items in stores. UPC (technically refers to UPC-A) consists of 12 numeric digits, that are uniquely assigned to each trade item. Along with the related EAN barcode, the UPC is the barcode mainly used for scanning of trade items at the point of sale, per GS1 specifications.
A-C. Abyssal Plain The flat area of the ocean basins between oceanic ridges and trenches or passive margins. Average depth of the abyssal plain is 4km below sea level. Typically the sedimentary rocks forming here are black shales and turbidites.Accretionary Wedge (prism) A zone of deformed sediment made up of thrust slices scraped off a subducting oceanic plate and added onto the over-riding plate.ontinental Crust A collective term for the crust that forming the continents; it has an average thickness of 35 km but can be up to 70 km under mountain ranges. Typically the composition is granitic with a density of 2.7 meaning that it is too buoyant to be subducted at convergent (destructive) plate margins.
Fold mountains are created by uplift and folding of tectonic plates as they move towards each other and collide. This is known as a compressional plate margin. An example is the Andes Mountain range in South America().The plates may be either 'continental and continental' or 'continental and oceanic'. The plates move towards each other, but there isn't a free space for them to move into because they are already touching each other.t a destructive plate margin where oceanic and continental plates collide, the oceanic plate is subducted, pulled under the continental plate-whilst the continental plate is crumpled upwards to form a mountain range. The Andes are an example of fold mountains formed at a destructive plate margin.