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.
Most of the continental crust is made up of igneous rocks. However,  there are metamorphic and sedimentary rocks that make up the  continental crust as well. Contributions. Mainly boulder clay (Soft rock) and chalk (Hard rock) these are what also form headlands and bays due to the difference in their resistance to weathering.