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
Definition of margin. 1  1 : the part of a page or sheet outside the main body of printed or written matter. 2  2 : the outside limit and adjoining surface of something : edge at the margin of the woods continental margin.