SUPPLY CHAIN DEFINITIONS. Definitions of a supply chain virtually universally encompass the following three functions: i. supply of materials to a manufacturer; ii. the manufacturing process; and, iii. the distribution of finished goods through a network of distributors and retailers to a final customer.
The thickest parts are under the continents and the thinnest parts are under the oceans. Crust. Earth's crust is made up of several elements: oxygen, 47 percent; silicon, 27 percent; aluminum, 8 percent; iron, 5 percent; calcium, 4 percent; magnesium, potassium and sodium, 2 percent. The crust is divided into huge plates that float on the mantle, the next layer.
Elements in the Earths Crust. Even though there are 92 elements that are naturally found, only eight of them are common in the rocks that make up the Earths outer layer, the crust. Together, these 8 elements make up more than 98% of the crust. The 8 most common elements in Earths crust (by mass): 46.6% Oxygen (O) 27.7% Silicon (Si)