A company car allowance is a predetermined sum paid to an employee as compensation for driving her own vehicle for business reasons. Companies use car allowances to minimize accounting costs. Once an employee has been allocated a car allowance, that amount is simply added to the employee's paycheck. For example, if the car allowance is $500 per month, this sum is paid to the employee via her paycheck.
Sedimentary rocks constitute about 10 percent of the earthâs crust by volume but cover 75 percent of the earthâs surface. Most of the rocks are concentrated on continents (500 million cu km) and continental slopes (190 million cu km); the ocean floor accounts for 250 million cu km. On continents about 75 percent by volume of all sedimentary rock is confined to geosynclinal regions, and about 25 percent is associated with platforms. More than 75 percent of the useful minerals extracted from the earthâs interior are contained in sedimentary rock.
The Earth's crust is an extremely thin layer of rock that makes up the outermost solid shell of our planet. In relative terms, it's thickness is like that of the skin of an apple. It amounts to less than half of 1 percent of the planet's total mass but plays a vital role in most of Earth's natural cycles. The crust can be thicker than 80 kilometers in some spots and less than one kilometer thick in others. Underneath it lies the mantle, a layer of silicate rock approximately 2700 kilometers thick. The mantle accounts for the bulk of the Earth.