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
What is a 'Margin'. Margin is the difference between a product or service's selling price and its cost of production or to the ratio between a company's revenues and expenses. It also refers to the amount of equity contributed by an investor as a percentage of the current market value of securities held in a margin account.