05.07.2009
A measure of how heavy or light a petroleum liquid is compared to water. If its API gravity is greater than 10, it is lighter and floats on water; if less than 10, it is heavier and sinks. API gravity is thus a measure of the relative density of a petroleum liquid and the density of water, but it is used to compare the relative densities of petroleum liquids
A minor secondary fault
To preserve the benzene from oxidization and to improve its storage capacity it is necessary to add anti-oxidants
Ron + Mon / 2
A fold in layers of rock caused by deformation. The older strata are found toward the center of the fold
An anticline is an example of rocks which were previously flat, but have been bent into an arch. It is thus an arch-shaped fold in which rock layers are upwardly convex. The oldest rock layers form the core of the fold, and outward from the core progressively younger rocks occur. Anticlines form many excellent hydrocarbon traps, particularly in folds with reservoir-quality rocks in their core and impermeable seals in the outer layers of the fold. Oil that finds its way into a reservoir rock that has been bent into an arch will flow to the crest of the arch and get stuck (provided of course that there is a trap rock above the arch to seal the oil in place). Opposite of syncline.