Full Definition of SITE. 1. a: the spatial location of an actual or planned structure or set of structures (as a building, town, or monuments) b: a space of ground occupied or to be occupied by a building.
Long story short - continental crust is thicker because is less dense, and it is less dense because it's composed mostly of quartz and feldspars, both having density around 2.6 g/cm3, whereas oceanic crust is made up by slightly denser Ca feldspar called plagioclase as well as pyroxenes and olivine, both having density above 3 g/dm3.
1 Mature oceanic plate is approximately 80-100 km thick, of which, the upper 5-7 km is oceanic crust. 2  Continental plate is somewhat thicker, perhaps 150-200 km thick, and includes continental crust which varies from 5 to 70 km in thickness.