Is Granite Or Sedimentary Older

It forms from the slow crystallization of magma below earth s surface.

Is granite or sedimentary older.

Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye. It forms due to crystallization from magma. Limestone is a sedimentary rock laid down in the oceans millions of years ago. If rounded pieces of granite are pebbles in a layer of conglomerate that lies on top of the granite then the granite must have been exposed weathered and eroded prior.

Sedimentary dikes or clastic dikes are vertical bodies of sedimentary rock that cut off other rock layers. Driven by the fluid pressure the sediment breaks. Then later a new pluton cooled creating new granite that is younger than the sandstone. Sedimentary rocks form as a result of weathering and deposition from previously formed rocks and are usually much softer than igneous or metamorphic rocks.

Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture. Metamorphic rocks form when igneous or sedimentary rocks are buried deep in the earth compressed and held for long periods of time at high temperatures. No granite is an igneous rock. Granite is an igneous rock originating from volcanic activity.

Sedimentary rock formation lacks the heat and pressure that created the igneous rock. When this happens new minerals may form and older pre existing minerals grow and change shape or shrink and even disappear completely. Sedimentary rocks unlike the igneous rock granite form on both the earth s surface and underwater. When shallow unconsolidated sediment is composed of alternating coarse grained and impermeable clay layers the fluid pressure inside the coarser layers may reach a critical value due to lithostatic overburden.

The principle of inclusions a piece of rock that is included in completely surrounded by sedimentary rock is older than the sedimentary rock in which it is included. Granites can be predominantly white pink or gray in color depending on their mineralogy the word granite comes from the latin granum a grain in reference to the coarse grained structure of such a completely crystalline rock. They can form in two ways. Sedimentary rock cannot be radiometrically dated you would only be dating the clasts themselves not the rock unit.

Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals this mineral composition usually gives granite a red pink gray or white color with dark mineral. But you could have had an igneous rock millions of years ago that was weathered and eroded into sediments that then became the sandstone. One easy way to. Essentially they are comprised of layer upon layer of sediment easy to remember sediment sedimentary build up over time.