The national average cost of a garage door installation, including labor and material, ranges from $700.92 to $1,345.92, according to homewyse.com. Receiving bids from several reputable contractors can help you get the best value on installation costs.
The crust is composed of two basic rock types granite and basalt. The continental crust is composed mostly of granite. The oceanic crust consists of a volcanic lava rock called basalt.Basaltic rocks of the ocean plates are much denser and heavier than the granitic rock of the continental plates.arth's rocky surface is divided into two types: oceanic crust, with a thin dense crust about 10 km thick, and continental crust, with a thick light crust about 40 km thick.
Best Answer: Continental crust is much thicker (25-70 km) than oceanic crust (7-10 km). Continental crust is generally more felsic, composed largely of granites and other high silica rocks whereas oceanic crust is mafic and composed largely of basalts.