The Most Extensive Granitic Rock

Overlying these within the fraser valley is a thick sequence of 3 sedimentary rock sandstone and shale.
The most extensive granitic rock. Most of the granitic rock in the mojave desert is late mesozoic in age 80 to 180 million years old. Granites with a great excess of alkali feldspar over plagioclase are known from new england. Granite in the continental crust. The bedrock geology of yosemite national park consists almost entirely of granitic rocks.
They occur in smaller bodies at numerous sites in british paleogene and neogene rocks and in the oslo region of norway but their most extensive development is in northern nigeria. The park boundary perfectly frames a landscape that is composed almost entirely of granite and it s no surprise that this landscape contains some of the most iconic rock formations on earth. At the surface granite is exposed in the cores of many mountain ranges within large areas known as batholiths and in the core areas of continents known as shields. Granite coarse or medium grained intrusive igneous rock that is rich in quartz and feldspar.
It is the most common plutonic rock of the earth s crust forming by the cooling of magma silicate melt at depth. 1 granitic and 2 metamorphic rocks of the coast and cascade mountains. Probably the most extensive area occurs along the north and east shores of georgian bay in ontario where granitic rock forms roughly 80 miles 140 km of shoreline chapman and putnam 1984 catling and brownell 1999 but other areas occur along ontario s lake superior shoreline as well as seen at pukaskwa national park and neys and lake superior provincial parks. The granites formed at depth within a volcanically active mountain range comparable in geologic setting to the andes chain in south america.
Volcanic intrusions 4 fill fractures within granitic metamorphic and sedimentary rocks. The most extensive are. Granite is an intrusive igneous rock which means it crystallized from molten rock called magma miles underground.