Definition of marriage. 1  1a see usage paragraph below : the state of being united as spouses in a consensual and contractual relationship recognized by lawb : the mutual relation of married persons : wedlockc : the institution whereby individuals are joined in a marriage.
The majority of the surface rocks on the North American continent are sedimentary. The mountainous regions of the west and southwest are made of igneous rocks. The Appalachian Mountain region of the eastern U.S. and most of eastern Canada are made of metamorphic rocks.
The composition of the crust is largely a mixture of rock that is both felsic and granitic. This is what makes it continental crust, though continental crust also tends to be above sea level. Felsic rock is igneous rock that is rich in the elements that make up feldspar and quartz.