Category: Geography

Clouds- Definition and Classification

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Clouds- Definition and Classification

Clouds- Definition and Classification Cloud is a visible, Dense mass of suspended water droplets or ice crystals, or Particles suspended in the air. Clouds are formed when air is forced to rise at a front, over mountains, or because of convection. The formation of cloud is a result of saturation of air when it is cooled to its dew point, or when it gains sufficient moisture from an adjacent source to raise the dew point to the ambient temperature. (You can read the water cycle). Types of Clouds: Luke Howard…

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List of Important Local Winds

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List of local winds

List of Important Local Winds local winds blow over a limited area. They are caused due to influence of local pressure gradient and terrain. The local winds blow between small, low, and high-pressure systems. These winds are influenced by local geographical conditions like distance from the ocean, lake, or mountain range, all these factors affect local winds. List of some important Local winds of the world: Name Place Characteristics Bora Adriatic Coast (A body of water separating the Italian Peninsula from the Balkans) These are Cold, Gusty, North-easterly from eastern…

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Plate Tectonics

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Plate tectonics

Plate Tectonics Plate tectonics: The term was first coined by JT Wilson in 1965. After the evolution of the concept of the “continental drift hypothesis” and “seafloor spreading” a broader concept of “plate tectonics” was developed in 1967. The theory of Plate Tectonics was introduced independently by McKenzie, Parker, Morgan, and Holmes in 1967. Theory of Plate Tectonics Plate tectonic theory states that the dynamics of the earth’s outer shell, the lithosphere are separated into plates that move over the asthenosphere, the upper molten portion of the mantle. Oceanic and…

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Earthquakes- definition, related facts

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Earthquakes- definition, related facts

Earthquakes (also called quakes, tremors, or temblors) A sudden movement of Earth’s crust is caused by the release of stress accumulated along geologic faults or by volcanic activity. In simple words, the earthquake refers to the shaking of the earth. Mainly it is a natural event caused due to release of energy and generates waves that travel in all directions. We can say that an earthquake is a series of shocks and tremors resulting from the sudden release of pressure along active faults and in areas of volcanic activity. Important…

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List of Important Glaciers of Himalayan Mountain

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Important Glaciers

List of Important Glaciers of Himalayan mountain The Glaciers are reservoirs of freshwater. They are formed from a mass of compacted recrystallized snow with the ability to flow. In simple words, a glacier is a huge mass of ice that moves slowly over land. As per National Snow & Ice Data Center, it occupies the world’s 10 % area. Here we have listed some important mountain glaciers of India which are relevant to the examination. List of Glaciers given in the table: Name of Glaciers Location Siachen Glacier The largest…

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List of main volcanoes in the world

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list of important volcanoes

List of main volcanoes in the world (For UPSC and other exams) Volcanos are landforms created by the accumulation of solidified lava and volcanic detritus from the earth’s crust. The list of main volcanos in the world and their features are given in the table. (for details about volcanoes- Must read → Volcanoes, definition, types, and facts) List of Main Active Volcanoes in the world: The list of main active volcanoes in the world with their location and latest activity is given below in the table: List of Active Volcano…

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Volcanoes: Definition, Types, & Facts

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subduction Zone of Volcanoes

Volcanoes: Definition, Types, & Facts Volcanoes referred to landforms created by the accumulation of solidified lava and volcanic detritus near the vent. In simple words, a volcano is a rupture in the crust of a planetary-mass object, like Earth, by which hot lava, gases, and volcanic ash escape from the magma chamber below the surface. Volcanoes are most often found on Earth at the place where tectonic plates are diverging or converging. The most concentration of volcanoes is found underwater. Magma In the deep of the earth, it is too…

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Continental Drift Theory

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Continental-Drift-Theory- The Matching of Continents (Jig- Saw- Fit)

Continental Drift Theory Continental Drift Theory: Abraham Ortelius first put forward the speculation that the continent might have ‘drifted’ in 1596. The first comprehensive and fully developed Continental Drift Theory was proposed by a German meteorologist, Alfred Wegener in 1912. Alfred Wegener was the first person who used the phrase ‘continental drift’. According to his hypothesis, all the continents were once been joined into a single landmass, called Pangaea, and a Mega Ocean surrounded this supercontinent. The name of the Mega Ocean was ‘Panthalassa’, before breaking apart and drifting to…

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Metamorphic rocks – Types and Characteristics

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rock cycle- formation of metamorphic rocks.

Metamorphic rocks – Types and Characteristics Introduction: Metamorphic rocks are formed by the transformation of pre-existing rocks (igneous, sedimentary) to a new type of rock and then followed by the process called metamorphism. The pre-existing rock is subjected to high temperatures (greater than 150 to 200 °C), and high pressure, which causes physical and chemical changes in the earth’s crust. Example of metamorphic rocks is- Gneiss, marble, slate, schist, etc. Metamorphic rocks make up a large part of Earth’s crust and form 12% of the Earth’s land surface. The Process…

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Sedimentary Rocks – Types and characteristics

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Types and Examples of sedimentary rocks

Sedimentary rocks Sedimentary rocks are a type of rock formed by the accumulation or deposition of organic particles or minerals and their consolidation at the earth’s surface. The whole process of formation of these rocks is called sedimentation. Types of Sedimentary Rocks These rocks are of the following types: Argillaceous (Aqueous Rocks) Aeolian rocks Glacial rocks. Argillaceous (Aqueous Rocks): These are a group of rocks formed by detritus. these are detrital rocks made of mudstones, siltstones, etc. Types of Argillaceous rocks: Marine: These rocks are formed due to the deposition…

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