Sometimes the rocks become so soft, due to their exposure to environmental conditions for longer duration, that they can be easily … Dec 08, 2020 - Rocks: Igneous, Sedimentary, Metamorphic & Rock Cycle UPSC Video | EduRev is made by best teachers of UPSC. Granite and basalt make up the majority of igneous rocks. Geomorphology, rock, rock cycle, geography, geography notes, weathering, erosion, mass movement, earth, relief features, igneous, metamorphic, sedimenatry ROCKS Sum or aggregate of one or more minerals is termed as rock. The scientific study of rocks … They are formed by the cooling of the lava on the … Deep-seated intrusive igneous rocks are called as Plutonic rocks and shallow depth intrusive igneous rocks are called as Hypabyssal Rocks. Extrusive Igneous Rocks. In this article we will discuss about the seven main characteristics of igneous rocks. Insights has redefined the way preparation is done in UPSC … Igneous rocks are formed whe. The characteristics of rocks directly influence the type of landforms generated. They are; Classification of Rocks. Igneous rocks are often characterized by glassy texture, … Basalt is dark and fine-grained with minerals rich in magnesium and iron. This is an exothermic process (it loses heat) and involves a phase change from the liquid to the solid state. Igneous rocks. Petrology is the science of rocks. The formation of igneous rocks can take two routes: fast or slow. It is either extrusive or intrusive and is the primary rock on the ocean floor. The intrusive igneous rocks or plutonic rocks are formed when the Magma cools within the earth's crust. (1) In all, the igneous rocks are roughly hard rocks and water percolates with great difficulty along the joints. This video is highly rated by UPSC students and has been viewed 1 times. These rocks are hard and resistant. 2. The italics terms are for IFS only. GK, General Studies, Optional notes for UPSC… This cooling determines the chemical composition and structure of the rock. They are formed by cooling and solidification of magma from beneath the earth’s crust. Igneous rocks are formed from the solidification of magma, which is a hot (600 to 1,300 °C, or 1,100 to 2,400 °F) molten or partially molten rock material. Give examples for each. ; The earth is made of igneous rock – at least at the surface where our planet is exposed to the coldness … Igneous Rocks. 1. Igneous rocks are crystalline solids which form directly from the cooling of magma. Rocks that cool over millions of years have large pebble sized grains and are called plutonic. Click here for a detailed analysis on Geology Optional UPSC IAS and IFS Indian Forest Services Geology Optional Syllabus Paper 1 Paper 1 Section A. Crystals can form in the mass if cooling happens very slowly, allowing the natural geometrical shapes of the molecules to form. The upper 16 kilometers of the Earth’s crust is made up of 95% Igneous rock, with a thin covering of sedimentary and metamorphic rocks. Body – Explain the origin, formation and characteristics of Igneous rocks along with its subtypes – Plutonic and Volcanic; sedimentary rocks and its subtypes – mechanically, organically and chemically formed sedimentary rocks and metamorphic rocks. Rocks are mostly classified into 3 forms. Compare and Contrast: Igneous, Metaorphic, and Sedimentary Rocks Types of Rock Sedimentary Igneous Metamorphic Images of the Three Types of Rocks Metamorphic Sedimentary Igneous Definitions Definitions Metamorphic Rock - Forms when pressure, temperature, or chemical processes The Especially feldspar and quartz are two common minerals which are generally found in the rocks. The landforms formed by the action of volcanoes and volcanic eruptions are known as volcanic landforms. 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