Common granoblastic rocks included QUARTZITE (quartz), and MARBLE (calcite or dolomite). The textures of some metamorphic rocks do not fit neatly into any of these categories. In such cases, where the protolith is obvious because the texture of the protolith is well preserved, the prefix " META" is simply used in front of the protolith name,, METAGRANITE, METABASALT, METAWACKE, .

Igneous rocks are of two types, intrusive (plutonic rocks) and extrusive (volcanic rocks). Intrusive igneous rocks are formed when the magma cools off slowly under the earth's crust and hardens into rocks. Gabbro and granite are examples of intrusive igneous rocks.

Nov 05, 2015· Igneous rocks are commonly used in construction and cosmetic products. Extrusive igneous rocks form when magma hardens above the earth's surface. Examples of these include pumice and basalt. Pumice is used in toothpaste and cosmetic products, while basalt is used in the construction of statues and buildings.

Both andesite (volcanic) and granodiorite (plutonic) are common igneous rocks formed at subduction zones. Down in that part of the subduction zone where the rocks initially melt to set the processes off that lead to granodiorite and andesite forming higher up, the rocks down there deep in the subduction zone are already hot.

Basalt and granite actually have quite a bit in common. Both are igneous rocks, which means that they cooled from a magma (the earth gets very hot just below the surface, and there is lots of liquid rock available). Both are made up of minerals from the silicate group, so .

Igneous rocks are also common on the surface in volcanically active regions, but they also occur deeper in the crust as granitic (mostly) intrusions. Important sediments are sand, clay, mud (wet mixture of clay and fine sand), and limy mud.

Igneous Rocks. Common rock types within the intrusive category are granite and diorite. Granite: Granite is the intrusive equivalent of rhyolite but has a coarser texture. A 12squaremile outcrop of granite is visible on the southwestern flank of the Sheeprock Mountains, Tooele and Juab Counties.

User: What is the most common rock on Earth?A. basalt B. pumice C. granite D. rhyolite Weegy: Granite is a common widely occurring type of intrusive, felsic, igneous rock which is granular and crystalline in rock consists mainly of quartz, mica, and feldspar. [ The word granite comes from the Latin granum, a grain, in reference to the coarsegrained structure of such a crystalline ...

The rock that is very commonly used for humans is granite. Granite is used a lot for counters and tabletops. That is because it is very hard and is very hard to chip or break. You wouldn't use sandstone to make a table top, it would crumble and you would get sand in your food! An igneous rock that is commonly found in Colorado is also granite.

Such rocks are characterised by the presence of distinct sediments or layers in them. Some examples of sedimentary rocks are limestone, shale, conglomerate, clays, quartz and dolomite are the common dominant mineralsinthem. Sedimentary rocks do not weather as rapidly as the igneous rocks. 3. Metamorphic Rocks:

Igneous rocks are formed by solidification of magma, which generally consists of silicate melt (molten rock mainly consisting of silica [Si]), mineral crystals, and dissolved gasses. Magma is generated deep beneath the Earth's surface. As it moves toward the surface, it may be forced out and erupt.

Plutonic rocks are primarily comprised of 5 minerals: quartz, potassium feldspar, plagioclase feldspar, biotite, and hornblende. Plutonic rocks, including granitic rocks, differ primarily in the relative proportions of quartz and feldspar, although texture is also an important consideration.

Nov 05, 2015· Igneous rocks are commonly used in construction and cosmetic products. Extrusive igneous rocks form when magma hardens above the earth's surface. Examples of these include pumice and basalt. Pumice is used in toothpaste and cosmetic products, while basalt is used in the construction of statues and buildings. Intrusive igneous rocks form when magma hardens below the earth's surface.

state, of igneous or sedimentary rocks sub­ jected to high temperature, high pres·sure, · or high shearing stresses within the crust of the earth. They include slates, schists, phyllite, gneisses, marbles, and many other less ~mman rock types.

Chapter 3: Igneous Textures • Rapakivi texture: – Plagioclase overgrowths on orthoclase (Kfeldspar) – Occurs in some granites • Spherulitic texture: – In silicic volcanic rocks in which needles of quartz and alkali feldspar grow radially from a common center • Variolitic texture: – Radiating plagioclase laths in some basalts are