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.
The crust is divided  into two types: oceanic crust and continental crust. Oceanic crust,  found under the ocean floor, is made of dense rocks such as  basalt. It â¦is about 7 kilometers (4 miles) thick.  Continental crust, found under land masses, is made of less dense  rocks such as granite.