Why Is Sill Important

Sill thickness has large impact on temperature and maturation of sedimentary basins holding magmatic intrusions. Incorrect interpreted sill thickness may lead to over or under estimation of petroleum potential of sedimentary basins.

What does the sill mean?

Definition of sill 1 : a horizontal piece (such as a timber) that forms the lowest member or one of the lowest members of a framework or supporting structure: such as. a : the horizontal member at the base of a window. b : the threshold of a door.

Why are sills formed?

Sills form as rising magma encounters vertical resistance from host rock. The upwelling magma then spreads out in the horizontal plane into area of lower resistance to form sheet-like layers of rock. Sill texture is a function of the time it takes for the magma to cool and solidify.