Split and merge into it. Answer by Scitrs. Confidence votes 412. The word Hindu came from the word Sindhu which meant those who lived on the other side of the Indus river. The Persian pronounced the Sindhu as Hindus, and all people living on the other side of the river Sindhu were called by them as Hindus.indu means one who believes in the Hindu Dharma and Philosophy as enunciated in Vedas, Upnishadas, Gita and other Hindu scriptures profess â¦ ing beliefs, principles, precepts, idealogy and practices of Hinduism.
Pegmatites may be composed of a variety of minerals. Terms such as granite pegmatite, gabbro pegmatite, syenite pegmatite, or names with any other plutonic rock type as prefix are used. Compositions in the range from granodiorite to granite are common.ome pegmatite bodies are small irregular patches less than 1 cm. (0.4 in) across in larger masses of plutonic or metamorphic rocks. Others may be thousands of meters in length and hundreds of meters thick. Some appear as dikes, veins, or sills. Many have irregular outlines.
Underground, they are formed when magma deep within the Earth becomes trapped in small pockets. As these pockets of magma cool slowly they become igneous rocks. Igneous rocks are also formed when volcanoes erupt. Igneous rocks are formed as the lava cools above ground.The upper 16 km of the Earthâs crust is composed of 95% igneous rock.Intrusive igneous rocks are formed from magma that cools and solidifies underground.oarse grained intrusive igneous rocks which form deep in the crust are termed as abyssal and those that form near the surface are called hypabyssal. Extrusive igneous rocks are formed at the crustâs surface as a result of the partial melting of rocks within the mantle and crust.