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GS Paper: GS1-15.Geographical features and their location- Changes in critical geographical features (including water-bodies and ice-caps) and in flora and fauna and the effects of such changes.

  • Sympathetic Solar Flares

    Why in the news?

    A rare celestial event unfolded as four solar flares called as Sympathetic Solar Flares simultaneously, signaling the onset of the Sun’s dynamic 11-year solar cycle.

    What is a Solar Cycle?

    • Given the Sun’s dynamic nature, electrically charged gases on its surface generate powerful magnetic fields, known as magnetic fields.
    • These magnetic fields undergo stretching, twisting, and tangling due to the constant movement of gases on the Sun’s surface, resulting in solar activity.
    • Scientists monitor solar cycles using sunspots. Solar activity fluctuates throughout the solar cycle, which typically spans about 11 years. 
    • The onset of a solar cycle typically features minimal sunspot activity, termed as a solar minimum.
    • For instance, the last Solar Cycle 25 commenced in December 2019, characterized by a low number of sunspots.

    What are Sympathetic Solar Flares?

    • Sympathetic solar flares are solar eruptions that occur in close temporal and spatial proximity to another solar flare or eruption.
    • These events are believed to be interconnected through magnetic fields or other physical processes occurring on the Sun.
    • When a solar flare or eruption happens on the Sun, it releases a burst of electromagnetic radiation and charged particles into space.
    • In some cases, the energy released during these events can cause disturbances in the Sun’s magnetic field.
    • These disturbances can trigger the occurrence of additional flares loop or eruptions in nearby regions of the Sun’s surface.
    • This event follows coronal mass ejections (CMEs) and intense plasma bursts.

    Implications for Earth

    • Potential impacts include disruptions to power grids, interference with communication networks, and increased radiation exposure for astronauts and aircraft passengers.
    • Solar storms can lead to spectacular natural light shows known as auroras, which are typically visible near the Earth’s magnetic poles.

    PYQ:

    [2012] The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs:

    (a) the water vapour of the air and retains its heat

    (b) the ultraviolet part of the solar radiation

    (c) all the solar radiations

    (d) the infrared part of the solar radiation
  • PREMIUM – Travelling the Regions of South America

    PREMIUM – Travelling the Regions of South America

    Why in the News?

    South America, known for its diverse landscapes and cultures, also harbors several disputed territories, each with its own historical, geopolitical, and economic significance. These disputes often arise from conflicting territorial claims, historical grievances, or resource-rich areas. 

    Diverse Landscapes of South America:

    • The Pacific Coastal Strip:
      • Between the ocean and the Andes mountain Range.
      • The coastline of South America is smooth and regular. At the river mouths, some inlets are used as harbors. The southwestern coast of the continent has fiords or deep inlets of the sea.
    • Andes Mountain Range:
      • The Andes stretch through the entire continent, running in the north-south direction from the Isthmus of Panama to the Strait of Magellan. The second-highest mountain system in the world.
      • Mount Aconcagua (an extinct volcano lies in Argentina)
      • Mount Ojas del Salado is the highest active volcano in the world of Argentina.
      • Part of seven countries: Venezuela, Colombia, Ecuador, Bolivia, Peru, Chile, and Argentina.
      • They form a chain of ranges and knots with enclosed intermontane plateaus namely in Ecuador and Bolivia.
      • Being part of the Pacific Ring of Fire, there are many volcanoes and frequent earthquakes in this region. Mount Cotopaxi and Mount Chimborazo are active volcanic peaks, which is the highest peak in South America.
    • About the Amazon River:
      • It is the world’s largest and second-longest (6,400 km) river in the world after the Nile.
      • Its journey begins high in the Andes Mountains. The river then makes its way east through thousands of miles of rainforests and lowlands until it empties into the Atlantic Ocean on the northeastern coast of Brazil
      • Its watershed spans the countries of Brazil, Peru, Ecuador, Colombia, Venezuela, and Bolivia.
      • It has more than 1,100 tributaries, which include the rivers like the Rio Negro, the Madeira River, and the Xingu River, etc.
      • The Amazon Rainforest, which represents about half of the Earth’s remaining rainforest, also constitutes its single largest reserve of biological resources.
      • It is sometimes referred to as the “lungs of the Earth” due to its role in regulating the planet’s oxygen and carbon cycles.

    Disputed Areas in South America

    Countries Involved Key Points Geographical Features
    Gulf of Venezuela Colombia, Venezuela
    • Inlet of the Caribbean Sea is Disputed over islands such as Los Monjes Archipelago due to Fishing rights and potential oil reserves.
    • Interpretation disputes regarding the 1941 Treaty of Delimitation            
    • Recent tensions over maritime confrontations and oil exploration activities.
    		 Surrounded by coastal mountain ranges with waters fed by several rivers
    Essequibo Region Guyana, Venezuela
    • Covers two-thirds of Guyana’s territory Historical grievances claimed by Venezuela.         
    • Recent oil discoveries raising tensions; ICJ case filed by Guyana.
    • Essequibo River flows through this region.
    		 Diverse landscapes including rainforests, savannahs, and mountains with the Essequibo River
    Atacama Desert Peru, Chile
    • Extremely Arid desert region            
    • War of the Pacific led to Chile’s control           
    • Valuable mineral resources contribute to disputes            
    • Bilateral talks and arbitration proposals for settlement
    		 Bordered by the Andes Mountains and the Pacific Ocean with salt flats, sand dunes, and volcanic formations
    Falkland Islands (Malvinas) Argentina, UK
    • Sovereignty disputes since 1833           
    • Economic interests include fisheries, tourism, and potential oil reserves           
    • Diplomatic efforts and UN resolutions for resolution
    		 Consists of two main islands with rugged coastlines and low mountains
    Darien Gap Colombia, Panama
    • Dense jungle terrain separating North and South America            
    • Challenges in illegal immigration discussions            
    • Characterized by dense rainforests, swamps, and mountains
    		 Part of the Darien National Park with dense rainforests, mangroves, and steep mountain slopes
    Arroyo de la Invernada or Rincon de Artigas… Brazil, Uruguay
    • Dispute over the Invernada River region near Masoller            
    • UN does not officially recognize the claim            
    • 237 km2 region with significant natural resources            
    • Efforts to resolve through bilateral talks and international mediation
    		 Rolling hills, grasslands, and small rivers with the Invernada River
    New River Triangle (Tigri Area) Suriname, Guyana
    • Disputed region within the Guiana Highlands            
    • Conflicting claims over territory interpretation of historical treaties and boundaries
    		 Dense rainforests, mountain ranges, and numerous rivers
    Isla Brasilera/Ilha Brasileira Brazil, Uruguay
    • Uruguay claims ownership of Isla Brasilera            
    • Strategically located near the tripoint with Argentina            
    • Efforts to resolve through diplomatic negotiations and legal arguments
    		 Small island located in the Uruguay River with lush vegetation
    Isla Suarez/Ilha de Guajara-mirim Bolivia, Brazil
    • Located in the Rio Mamore as a border between Bolivia and Brazil           
    • Economically dependent on Guajara-Mirim, Brazil            
    • Treaty signed in 1958 maintains the status quo            
    • Challenges of border management in riverine environments
    		 Riverine island characterized by tropical vegetation and wetlands
    Southern Patagonian Ice Field Argentina, Chile
    • Spanning parts of Argentina and Chile            
    • Border demarcation remains undefined in certain areas           
    • Bilateral efforts for resolution include scientific cooperation and mapping projects
    		 Vast expanse of ice and snow covering rugged mountain ranges and deep valleys
    Lithium Triangle  Argentina, Bolivia, and Chile
    • It is characterized by various salt pans or salars, concentrated along the Atacama Desert and adjacent arid regions.
    • The Salar de Atacama in Chile boasts the highest lithium concentration (0.15% by weight) among all brine sources worldwide. 
    • Argentina boasts more than half of the world’s total lithium resources and holds the distinction of having the 2nd-largest lithium resources, the 3rd-largest lithium reserves, and the 4th-largest lithium production in the world.
    • India’s KABIL (Khanij Bidesh India Ltd) has announced an investment of ₹211 crore ($25.712 million) over five years for exploration stage activities in five lithium blocks in the Fiambala area of Argentina.
    		 Key reserves of Lithium include:

    1. Uyuni (Bolivia): This salt flat is not only the world’s largest salt flat but also contains significant lithium reserves.  
    2. Atacama (Chile): Located in the Atacama Desert, Salar de Atacama is home to one of the largest lithium reserves globally. 
    3. Hombre Muerto (Argentina): This salt flat in northwestern Argentina also hosts lithium extraction operations.

     

    Note: Bolivia and Paraguay are land-locked countries in South America

    PYQ:

    [2013] “Climate is extreme, rainfall is scanty and the people used to be nomadic herders.”  

    The above statement best describes which of the following regions?

    (a) African Savannah

    (b) Central Asian Steppe

    (c) South American Tropical

    (d) Siberian Tundra

     

  • Jiadhal River and Change of its Course

    Why in the news?

    • Climate Change is disrupting Jiadhal River’s (Dhemaji district, Assam) tranquil flow, leading to unprecedented shifts in its course and causing upheaval for residents.

    About Jiadhal River:

    • It flows through the districts of Darrang, Udalguri, and Baksa in the northeastern state of Assam.
      • It is also known Kumotiya River after flowing from Gogamukh.
    • Origin: From the Hills of Bhutan, flows through the Assam Himalayas before meandering through the plains of Assam. It is formed by the confluence of several smaller streams.
    • Major tributaries: Kolong River and the Daokao River.
    • It eventually joins the Brahmaputra River near the town of Nalbari.
    • It is known as the ‘Sorrow of Dhemaji’ for the heavy damage caused by annual floods and erosion.

    Factors leading to changes in the Jiadhal River’s Course  

    • Erosion: Flowing water gradually wears away the riverbanks and bed, causing the river to meander and change course.
    • Sediment deposition: Accumulation of sediment can create new channels or alter the flow pattern of the river.
    • Human activities: Dams, channelization, urbanization, deforestation, and mining can disrupt natural river processes, leading to changes in flow and morphology.
    • Climate change: Changes in precipitation, temperature, and glacier melt affect river flow patterns and behavior.
    • Tectonic activity: Uplift, subsidence, and faulting influence river topography and drainage patterns, leading to adjustments in course and behavior.

    PYQ:

    [2017] With reference to river Teesta, consider the following statements:

    1. The source of river Teesta is the same as that of Brahmaputra but it flows through Sikkim.

    2. River Rangeet originates in Sikkim and it is a tributary of river Teesta.

    3. River Teesta falls into Bay of Bengal at the border of India and Bangladesh.

    Which of the statements given above is/are correct?

    (a) 1 and 3 only

    (b) 2 only

    (c) 2 and 3 only

    (d) 1, 2 and 3

  • Mount Etna’s Volcanic Vortex Rings: A Rare Natural Phenomenon

    Mt. Etna

    Why in the news?

    Mount Etna, located on the east coast of Sicily in Italy recently gained attention for emitting circular rings of vapor from its summit, known as volcanic vortex rings.

    About Mount Etna

    • Mount Etna is located on the east coast of Sicily, Italy.
    • It is an active stratovolcano, characterized by its conical shape formed by layers of hardened lava, ash, and volcanic rocks.
    • It is Europe’s tallest active volcano, standing at approximately 3,329 meters (10,922 feet) above sea level.
    • It is one of the most active volcanoes in the world and has been erupting for thousands of years, with the first recorded eruption dating back to around 1500 BCE.
    • Mount Etna and its surrounding area have been designated as a UNESCO World Heritage Site since 2013, recognizing its geological significance and natural beauty.
    • It boasts five craters responsible for eruptions, alongside numerous vents along its slopes.

    What are Volcanic Vortex Rings?

    • Volcanic vortex rings are a rare phenomenon observed when gas, primarily water vapor, is rapidly released through a vent in the volcano’s crater, forming circular rings of smoke above the mountain.
    • This phenomenon, similar to smoke rings blown by cigarette smokers, occurs when gas is expelled through a nearly perfect circular vent in the crater.
    • These rings can rise in the air for up to 10 minutes but may disintegrate quickly under windy conditions.

    Volcanism in Italy

    • The volcanism of Italy is due chiefly to the presence, a short distance to the south, of the boundary between the Eurasian Plate and the African Plate.
    • Italy is a volcanically active country, containing the only active volcanoes in mainland Europe (while volcanic islands are also present in Greece, in the volcanic arc of the southern Aegean).
    • The lava erupted by Italy’s volcanoes is thought to result from the subduction and melting of one plate below another.
    • Other active volcanoes include Mt. Stromboli and Vesuvius.

    Historical and Recent Observations

    • Etna produces more vapor rings than any other volcano on Earth, making it a hotspot for studying this phenomenon.
    • The occurrence of volcanic vortex rings was first documented in 1724 at Mount Etna and Vesuvius in Italy, and has since been observed at various volcanoes worldwide.
    • Recent observations of this phenomenon have been reported at volcanoes in Alaska, Ecuador, Guatemala, Iceland, Italy, Japan, Vanuatu, New Zealand, and Nicaragua.

    Recent Volcanic Eruptions in News:

    Many of the world’s most active volcanoes are concentrated in the Pacific Ring of Fire, encompassing regions like New Zealand, Southeast Asia, Japan, and the western coast of the Americas. This volatile area also experiences about 90% of all earthquakes globally.

    • Kilauea, Hawaii: The Kilauea volcano in Hawaii captivated the world with a nearly nonstop eruption that began in 1983 and continued for an astonishing 35 years until 2018. Remarkably, it rekindled in 2021, with the eruption still ongoing.
    • Dukono, Indonesia: Erupting since August 1933, Dukono volcano in Indonesia stands as a testament to long-term volcanic activity, defying the passage of time.
    • Santa Maria, Guatemala: The eruption of Santa Maria in Guatemala commenced in June 1922 and persists to this day, underscoring the enduring nature of certain volcanic phenomena.
    • Yasur, Vanuatu: Yasur in Vanuatu first erupted around 1270 and has maintained its volcanic activity, continuing as of June 9, 2023.

    Understanding Volcanoes

    • Volcanoes are geological features characterized by openings or vents through which lava, tephra (small rocks), and steam erupt onto the Earth’s surface.
    • They result from both their own eruptions and the broader processes of tectonic plate movement.
    • Volcanic eruptions are essentially the result of magma, or molten rock, beneath the Earth’s surface rising, bubbling, and ultimately overflowing, much like boiling milk spilling out of a pot on a stove.
    • The magma seeks pathways to vents within the volcano, where it erupts and is expelled across the land and into the atmosphere, a phenomenon referred to as lava.

    Appearance Formation Eruption Style Notable Examples
    Cinder Cones Small, steep, conical Formed from basaltic magma with high gas content Often explosive eruptions with cinders/scoria Paricutin (Mexico), Sunset Crater (USA)
    Composite/Stratovolcanoes Tall and symmetrical Result from alternating layers of lava, ash, etc. Both explosive and effusive eruptions Mount St. Helens (USA), Mount Fuji (Japan)
    Shield Volcanoes Broad and gently sloping Primarily formed from basaltic magma Primarily non-explosive with extensive lava flows Mauna Loa, Mauna Kea (Hawaii)
    Lava Domes Rounded dome-like shape Formed from slow extrusion of viscous magma Typically non-explosive but can be dangerous Novarupta Dome (Alaska), Mount St. Helens’ Lava Dome (USA)

     

    PYQ:

    [2018] Consider the following statements:

    1.    The Barren Island volcano is an active volcano located in the Indian Territory.

    2.    Barren Island lies about 140 km east of Great Nicobar.

    3.    The last time the Barren Island volcano erupted was in 1991 and it has remained inactive since then.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 and 3

    (c) 3 only

    (d) 1 and 3

  • In news: Ramapo Fault

    Why in the news?

    • An earthquake of magnitude 4.8 hit the New York City in a rare event.
    • The Ramapo Fault in Appalachian Mountains near New Jersey is a being considered as a reason behind this earthquake.

    Appalachian Mountains

    • The Appalachian Mountains extend from the Canadian province of Newfoundland and Labrador in the north to central Alabama in the southern US.
    • The total length of the Appalachian Mountain range is approximately 2,200 miles (3,500 kilometers), making it one of the longest mountain chains in the world.
    • Geologically, it is one of the oldest mountain ranges on Earth, formed over 480 million years ago during the Ordovician Period. They are considered a Paleozoic mountain range.
    • They were formed through a series of tectonic collisions and uplift events, including the assembly of the supercontinent Pangaea.
    • The highest peak in the range is Mount Mitchell in North Carolina, standing at an elevation of 6,684 feet (2,037 meters) above sea level.
    • The Appalachian Mountains hold cultural significance for various indigenous tribes, including the Cherokee, as well as early European settlers who established communities in the region.

    About Ramapo Fault

    • Fault lines are fractures in the Earth’s crust that facilitate movement of tectonic plates, triggering earthquakes.
    • The Ramapo Fault is resulted from tectonic activity associated with the breakup of the supercontinent Pangaea during the Mesozoic Era.
    • It is primarily a right-lateral strike-slip fault, formed by horizontal movement along the fault line due to the ongoing motion between the North American and Eurasian plates.
    • While the Ramapo Fault is not as seismically active as faults in other regions, it has experienced earthquakes in the past and remains a potential source of seismic hazards.

    Geographical Distribution:

    • The fault extends across three states in the northeastern United States: Pennsylvania, New Jersey, and New York.
    • The fault crosses various topographic features, including rift valleys, hills, and ridges, reflecting the diverse geological history of the region.
    • It intersects with the Appalachian Mountains, influencing the overall topography of the surrounding areas.

    PYQ:

    [2012] When you travel in Himalayas, you will see the following:

    1.    Deep gorges

    2.    U-turn river courses

    3.    Parallel mountain ranges

    4.    Steep gradients causing land-sliding

    Which of the above can be said to be the evidences for Himalayas being young fold mountains?

    (a) 1 and 2 only

    (b) 1, 2 and 4 only

    (c) 3 and 4 only

    (d) 1, 2, 3 and 4

     

  • Ozone found on Jupiter’s moon Callisto

    Why in the news?

    PRL Ahmedabad researchers has uncovered evidence of ozone presence on Jupiter’s moon Callisto, offering profound insights into celestial chemical processes.

    About Jupiter and its Moons

    Description
    Discovery Known since ancient times;

    Galileo Galilei observed Jupiter and its moons through a telescope in 1610
    Composition Mostly composed of hydrogen and helium, with traces of other gases such as ammonia, methane, and water vapor
    Diameter 139,822 kilometers
    Mass 1.898 × 10^27 kilograms (317.8 Earth masses)
    Orbital Period Approximately 11.86 Earth years
    Average Distance from Sun Approximately 778 million kilometers
    Surface Temperature Approximately -145°C (-234°F)
    Magnetic Field Strong magnetic field, the strongest in the solar system
    Moons Jupiter has 79 known moons, including the four largest Galilean moons: Io, Europa, Ganymede, and Callisto.

    Other notable moons include Amalthea, Himalia, Elara, Leda, Thebe, Metis, Adrastea, and more.

    The moons vary significantly in size, composition, and orbital characteristics.
    Great Red Spot Enormous storm system, known to exist for at least 400 years
    Exploration Explored by spacecraft such as Pioneer, Voyager, Galileo, Juno, and more

    Callisto and its Unique Environment

    • Composition: Callisto’s predominantly icy surface, interspersed with rocky materials, sulphur dioxide, and organic compounds, positions it as a compelling candidate for extraterrestrial life exploration.
    • Geological Stability: Despite extensive cratering, Callisto’s surface exhibits geological inactivity, suggesting long-term stability conducive to preserving subsurface oceans or potential habitats.

    Significance of Ozone Findings

    • Life-Sustaining Component: Ozone, a molecule composed of three oxygen atoms, plays a vital role in shielding celestial bodies from harmful ultraviolet radiation, fostering conditions conducive to life.
    • Earthly Parallel: Just as the Earth’s ozone layer protects against harmful UV radiation, the presence of ozone on Callisto hints at stable atmospheric conditions and potential habitability, sparking scientific intrigue.

    PYQ:

    What is the difference between asteroids and comets?

    1.    Asteroids are small rocky planetoids, while comets are made of ice, dust and rocky material.

    2.    Asteroids are found mostly between the orbits of Jupiter and Mars, while comets are found mostly between Venus and Mercury.

    3.    Comets show a perceptible glowing tail, while asteroids do not.

    Which of the statements given above is/ are correct? (2011)

    (a) 1 and 2 only

    (b) 1 and 3 only

    (c) 3 only

    (d) 1, 2 and 3

  • Places in news: Afanasy Nikitin Seamount

    Why in the news?

    • India has applied to the International Seabed Authority (ISBA) for exploration rights in the Afanasy Nikitin (AN) Seamount in the Indian Ocean outside its jurisdiction.
    • India’s application is motivated by reports of Chinese vessels conducting reconnaissance in the same region, raising concerns about strategic interests and resource competition.

    About International Seabed Authority (ISBA)

     

    • The ISBA is an intergovernmental organization established under the United Nations Convention on the Law of the Sea (UNCLOS).
    • It was established in 1994 and headquartered in Kingston, Jamaica.
    • ISA is tasked with regulating mineral-related activities in the international seabed area beyond national jurisdiction, which includes polymetallic nodules, polymetallic sulphides, and cobalt-rich ferromanganese crusts.
    • The Authority issues exploration and exploitation contracts to countries and private entities for deep-sea mining activities, subject to certain regulations and environmental safeguards.
    • ISA comprises various organs, including the Assembly, the Council, the Legal and Technical Commission, and the Secretariat, each with specific functions related to deep-sea mining regulation.
    • According to Article 156(2) of the UNCLOS, all UNCLOS parties are members of ISBA.
    • As of 2023 has 169 members, including 168 member states and the European Union.
    • India became a member of the UNCLOS in 1994.

     

    About AN Seamount

    • The AN Seamount, located about 3,000 km from India’s coast, is a substantial structural feature in the Central Indian Ocean Basin.
    • A seamount is a large submarine landform that rises from the ocean floor without reaching the surface, and thus is not an island.
    • It is 400 km-long and 150 km-wide. From an oceanic depth of about 4,800 metres it rises to about 1,200 metres.
    • It was discovered during a marine research expedition, named after the Russian explorer Afanasy Nikitin.
    • It is renowned for its polymetallic nodules containing cobalt, nickel, manganese, and copper

    Continental Shelf Claims and Implications

    • Sri Lanka has applied for continental shelf claims up to 500 nautical miles beyond its Exclusive Economic Zone (EEZ), citing a special provision.
    • India, noting Chinese presence, has staked a claim for exploration rights to prevent future consequences.
    • India has also applied for permission to explore another region, spanning 3,00,000 square km, called the Carlsberg Ridge in the Central Indian Ocean to investigate for polymetallic sulphides, which are reportedly rich in copper, zinc, gold and silver.

    PYQ:

    2021: Consider the following statements:​

    1. The Global Ocean Commission grants licences for seabed exploration and mining in international waters.​
    2. India has received licences for seabed mineral exploration in international waters.​
    3. ‘Rare earth minerals’ are present on seafloor in international waters.​

    Which of the statements given above are correct?​

    a)    1 and 2 only ​

    b)    2 and 3 only​

    c)    1 and 3 only ​

    d)    1, 2 and 3​

     

    Practice MCQ:

    Consider the following statements about the International Seabed Authority (ISBA):

    1. ISBA is an intergovernmental organization established under the United Nations Convention on the Law of the Sea (UNCLOS).
    2. All UN members are naturally parties to the ISBA.

    Which of the given statements is/are correct?

    a)    Only 1

    b)    Only 2

    c)    Both 1 and 2

    d)    Neither 1 nor 2

  • Geo-Heritage Sites in India

    Why in the news

    • Pandavula Gutta, an ancient geological marvel predating the Himalayan hills, has been officially designated as Telangana’s sole Geo-heritage site.
    • Also the 165 million-year-old meteor Ramgarh Crater in Rajasthan was declared geo-heritage site.

    [A] Pandavula Gutta

    • Pandavula Gutta is located in Jayashankar Bhupalpally District in Telangana.
    • It is known for its rock art and geological heritage.
    • The site features Paleolithic cave paintings depicting wildlife and symbols.
    • Discovered in 1990, it showcases habitation from the mesolithic to medieval times.
    • Recognized as the sole Geo-heritage site in Telangana, older than the Himalayan hills.

     

    [B] Ramgarh Crater

    • The Ramgarh Crater, also known as Ramgarh structure, Ramgarh Dome, and Ramgarh astrobleme, is a meteor impact crater located near the town of Ramgarh in Baran district of Rajasthan.
    • It is established as an asteroid impact crater in India, excavated within sandstone, shale, and limestone horizons of the Lower Bhander Group of the Vindhyan Region.
    • It was formed by a meteorite impact, with a diameter of 3.2 kilometers and an elevation of over 200 meters above the surrounding terrain.
    • It is declared Conservation Reserve, namely Ramgarh Conservation Reserve, under the Wildlife (Protection) Act, 1972 and a notified wetland under Wetland (Conservation & Management) Rules, 2017.

     

    What are Geo-Heritage Sites?

    • Geo-Heritage Sites in India are geological features of significant importance, either culturally or inherently, that provide insights into the Earth’s evolution or serve educational purposes.
    • These sites are recognized and protected by the Geological Survey of India (GSI) and the respective State governments.
    • India presently has 34 National Geological Heritage Monument Sites.
    • Examples:
      1. Mawmluh Cave in Meghalaya
      2. Majuli Island in Assam
      3. Chabimura in Tripura
    • Purpose:
      1. Promote geotourism
      2. Preserve unique geological formations
      3. Enhance geological literacy among the public

     

    Tap this link to read more about all Geo-Heritage Parks in India:

    https://vikaspedia.in/education/childrens-corner/geological-heritage-sites-of-india

    PYQ:

    Q.Which one of the following statements is correct?​ (2021)

    1. Ajanta Caves lie in the gorge of Waghora River.​
    2. Sanchi Stupa lies in the gorge of Chambal River.​
    3. Pandu-Lena Cave Shrines lie in the gorge of Narmada River.​
    4. Amaravati Stupa lies in the gorge of Godavari River.​

    Practice MCQ:

    Which of the given statements about the Ramgarh Structure is NOT correct?

    1. It is an asteroid impact crater.
    2. It is located in the Deccan Plateau.
    3. It is a notified wetland under Wetland (Conservation & Management) Rules, 2017.
    4. It is under Conservation Reserve under the Wildlife (Protection) Act, 1972.

  • Atmospheric Research Testbed in Central India (ART-CI)

    Why in the news-

    • The Ministry of Earth Sciences has commissioned Atmospheric Research Testbed-Central India (ART-CI) near Bhopal.

    About Atmospheric Research Testbed

    • ART-CI stands as an innovative testbed facility, pioneering the exploration of monsoon convection and land-atmosphere interactions, marking a significant advancement in climate research.
    • The Indian Institute of Tropical Meteorology (IITM), Pune leads ART-CI, operating under the Ministry of Earth Sciences (MoES).

    Mission Objectives

    • ART-CI primarily targets the monsoon trough area, encompassing the Monsoon Core Zone (MCZ), a critical component of the regional climate system.
    • Understanding this zone is paramount for precise weather forecasts and accurate climate modelling within India.

    Monsoon Core Zone (MCZ)

     

    • MCZ is a region in India stretching from Gujarat to West Bengal in the east.
    • India Meteorological Department demarcates it as an agricultural region where cropping is mostly rainfed.
    • It is the region within the monsoon trough area that plays a central role in the dynamics of the Indian monsoon system.
    • It is characterized by intense convective activity, significant rainfall, and crucial atmospheric interactions that influence the overall behavior of the monsoon.
    • The MCZ typically experiences a concentration of atmospheric processes that drive the onset, progression, and withdrawal of the monsoon rains across the Indian subcontinent.

    Features and Capabilities

    • ART-CI’s development unfolds incrementally as part of the Atmosphere & Climate Research-Modelling Observing Systems & Services (ACROSS) umbrella scheme.
    • The facility will feature an extensive array of remote-sensing and in-situ instruments.
    • These tools would help monitoring of various atmospheric parameters like convection, cloud cover, precipitation, soil moisture, radiation levels, and microphysics.

  • In news: Popocatepetl Volcano

    In the news

    • Popocatepetl, Mexico’s most dangerous active volcano has erupted 13 times in the past day, hurling columns of ash and smoke into the sky.

    About Popocatepetl Volcano

    • Popocatepetl — which means “Smoking Mountain” in the Aztec Nahuatl language — is located in central Mexico roughly 72 km southeast of Mexico City.
    • Popocatepetl is situated in the eastern half of the Trans-Mexican Volcanic Belt, in Central Mexico.
    • It lies on the border between the states of Puebla and Morelos.
    • The summit of Popocatepetl stands at an elevation of about 5,426 meters above sea level, making it the second-highest peak in Mexico after Citlaltepetl (Pico de Orizaba).

    Geological Details

    • Popocatepetl is a stratovolcano (composite volcano) characterized by its steep, conical shape built up by successive layers of volcanic ash, lava flows, and pyroclastic materials.
    • It is one of Mexico’s most active volcanoes, with documented eruptions dating back to the 14th century.
    • In the modern era, significant eruptions have occurred in 1947, 1994, 2000, 2005, and ongoing activity since 2013.
    • The volcano’s eruptions are primarily andesitic to dacitic in composition, characterized by the eruption of viscous lava flows and explosive eruptions producing ash clouds, pyroclastic flows, and lahars (mudflows).

    Try this PYQ from CSE Mains 2021

    Q. Mention the global occurrence of volcanic eruptions in 2021 and their impact on regional environment.