Metamorphic Rocks
How metamorphic rocks are formed? Metamorphic rocks are formed as a result of the change of form of other rocks. The word transformation metamorphic has been derived from ‘metamorphose’ which means a change in form. Thus, metamorphic rocks are formed due to changes either in the form or composition of sedimentary rocks and igneous rocks. “Metamorphic rocks […]
Sedimentary Rocks
Introduction A ‘sedimentary rock is formed as a result of the accumulation and compaction of sediments. The term sedimentary is derived from the Latin word ‘sedimentum’ which means-‘setting down’. These are also known as ‘layered’ or stratified rocks because they are characterized by different layers or strata of different types of sediments. The debris or […]
Igneous Rocks
Introduction The materials of the earth’s crust or lithosphere are called Rocks. The word ‘rock’ included all the materials of the crust, whether it is hard or soft. Rock can be hard like granite and sandstone, soft like clay and sand, porous like chalk and limestone or it can be impervious like slate. Generally, rocks are composed […]
Mountain
Mountains are the relief of the second order on the earth’s surface. They are 1,000 m higher than the adjacent areas and characterized by a lateral steep slope and narrow summit. Mountains whose height is less than 1,000 m are called hills. The top or the highest part of a mountain or hill is called […]
Internal Structure of the Earth
Preparing for competitive exams such as B.A., M.A., UGC NET, UPSC, RPSC, KVS, NVS, DSSSB, HPSC, HTET, RTET, UPPCS, and BPSC in geography requires a deep understanding of various aspects of the Earth, including its internal structure and landforms. Although the study of the Earth’s internal structure is often associated with geology, it plays a […]
Geological History of the Earth
At present, the history of the earth is divided into several Eras. These eras are again arranged sequentially into Epochs. Each epoch is again divided into periods known as Shakas (Period).