Is Granite Or Sedimentary Older

Granite is a very hard granular crystalline igneous rock which consists mainly of quartz mica and feldspar and is often used as building stone sandstone is defined as a rock which is composed of sand sized grains of various minerals mostly of uniform size and often are smooth and rounded.

Is granite or sedimentary older.

Sedimentary dikes or clastic dikes are vertical bodies of sedimentary rock that cut off other rock layers. It forms from the slow crystallization of magma below earth s surface. When this happens new minerals may form and older pre existing minerals grow and change shape or shrink and even disappear completely. 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.

One easy way to. 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. It forms due to crystallization from magma. Strictly speaking granite is an.

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. Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye. Limestone is a sedimentary rock laid down in the oceans millions of years ago. Sedimentary rock formation lacks the heat and pressure that created the igneous rock.

Sedimentary rock cannot be radiometrically dated you would only be dating the clasts themselves not the rock unit. But you could have had an igneous rock millions of years ago that was weathered and eroded into sediments that then became the sandstone. Limestone does turn into marble when subjected to huge. 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. No granite is an igneous rock.

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. They can form in two ways. Granite is an igneous rock originating from volcanic activity. 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.