Why is the intrusive granite formed after sedimentary rocks
The overburden (sedimentary or metamorphic rocks) of the intrusive granite can have three contact relationships with granite.
One is intrusion, that is, the first overlying sedimentary rocks, followed by granitic magma intruding into the formation of granite, then the sedimentary rocks formed before the granite.
One is the deposition of contact, that is, the first granitic magma intruded into the overlying strata, later, crustal uplift, magmatic rock overlying strata was eroded, followed by crustal decline, and the accumulation of new debris deposited down to form sedimentary rocks Then, the sedimentary rocks are formed after granite.
Intrusive magma does not emit the surface and therefore penetrates into the overlying strata or rock mass (including sedimentary rocks, metamorphic rocks, magmatic rocks).
There are three major types of rocks, sedimentary rocks, magmatic rocks, metamorphic rocks.
Sedimentary rocks are caused by the erosion of the original rock, the weathering crushed, the debris (mud, sand, gravel) by the external force (wind, water, etc.) the role of transport, accumulation of sediments formed a class of rock. The original rock can be formed early Magmatic rocks, can also be sedimentary rocks can also be metamorphic rocks.
The magmatic rocks are divided into intrusive and undulating types according to their form of output, and the magmatic rocks of the jetting type can be eroded and covered in the early formation of the underlying strata or rocks (sedimentary rocks, metamorphic rocks or magmatic rocks).
