The beginning of the amazing events at Krakatoa in 1883 date to May 20 when there were initial rumblings and venting from the volcano, which had been dormant for about 200 years.
A refinery margin is the revenue associated with refining petroleum, expressed as a value per volume (e.g. $/L), net of the cost of the crude oil input. The simplest refining
Legal Definition of margin. 1  1 : the difference between net sales and the cost of the merchandise sold from which expenses are usually met or profits derived. 2  2 : the amount by which the market value of collateral is greater than the face value of a loan.