UPSC PRELIMS 2026
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The Druzhba pipeline ("Friendship" in Russian) is one of the world's longest oil pipeline networks, stretching ~5,500 km to transport Russian oil to Eastern Europe, built in the 1960s. It is a vital artery, carrying around 1.2–1.4 million barrels/day, with a northern branch (Poland, Germany) and a southern branch (Ukraine, Slovakia, Hungary).
A fumarole is a vent in the Earth's surface, typically near volcanoes, that emits steam and volcanic gases like carbon dioxide and sulfur compounds. Representing late-stage volcanic activity or magma degassing, these fissures can be persistent or appear before/after eruptions. Fumaroles can form sulfur deposits and are sometimes called solfataras
😻Barren Island, located in the Andaman and Nicobar Islands, is India’s only active volcano
☹️Narcondam Island is a remote, uninhabited 6.8 km² volcanic island in India's Andaman Sea, located ~240 km northeast of Port Blair. As a protected wildlife sanctuary, it is famous as the only home of the endangered, endemic Narcondam Hornbill. The island features a dormant cone-shaped volcano, rising 710 meters above sea level.
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The Leeuwin Current is a warm, low-salinity ocean current that flows southward along the Western Australian coast, unusual because it moves against prevailing winds and opposite to typical cold, equatorward eastern boundary currents. It carries tropical water from Indonesia towards Cape Leeuwin, driving mild winters and higher rainfall in the region
The Irminger Current is a north Atlantic ocean current setting westward off the southwest coast of Iceland. It is composed of relatively warm and saline waters from the eastern North Atlantic that are fed by the North Atlantic Drift. The Irminger Current is part of the North Atlantic subpolar gyre.
🍀Karmanasa River is a 192 km tributary of the Ganges in India, flowing through Bihar and Uttar Pradesh, often forming the border between them. It originates in the Kaimur Hills (Bihar)
🍃Punpun River is a sacred 200–235 km long tributary of the Ganges that originates in the Palamu district of Jharkhand and flows through Bihar
#RIVER
Shale is a fine-grained, clastic sedimentary rock composed of compacted mud, clay minerals, and silt, characterized by its ability to split into thin layers (fissility)
😄Geyserite, or siliceous sinter, is a porous, opaline silica deposit formed by hot springs and geysers
😏Halite, commonly known as rock salt, is the natural mineral form of sodium chloride (\(NaCl\)), forming isometric, typically cubic crystals
😈Potash is a vital potassium-rich salt, primarily used as a fertilizer to enhance plant growth, increase crop yields, and improve water efficiency.
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Speleothems are natural mineral deposits formed in underground caves, primarily through the slow accumulation of minerals—mostly calcium carbonate—from water seeping into the cave. Common forms include stalactites (hanging from the ceiling) and stalagmites (rising from the ground).