underground cave lwp
by: lwcr • 30
behold the beauty of underground cave on your android screen. a cave or cavern is a natural underground space large enough for a human to enter. caves form naturally by the weathering of rock and often extend deep underground. get this scary wallpapers and dark wallpapers now. the word cave can also refer to much smaller openings such as sea caves, rock shelters and grottos. reed flute. speleology is the science of exploration and study of all aspects of caves and the environment that surrounds the caves. exploring a cave for recreation or science may be called caving, potholing, or spelunking. some cave story, mammoth cave and man cave can be found inside it. the formation and development of caves is known as speleogenesis. caves are formed by various geologic processes and can be variable sizes. these may involve a combination of chemical processes, erosion from water, tectonic forces, microorganisms, pressure, and atmospheric influences. allegory of the cave, compass. for karst caves the maximum depth is determined on the basis of the lower limit of karst forming processes, coinciding with the base sequences limestone, which may be lower than the erosion base due to the presence of siphon channels.
most caves are formed in limestone by dissolution. a veil of darkness cloaks the natural beauty of caves. some are found in cliffs at the edge of the coastline, chipped away by the relentless pounding of waves. others form where a lava tube's outer surface cools and hardens and the inside of the molten rock drains away. caves even form in glaciers where meltwater carves tunnels at the beginning of its journey to the sea. but most caves form in karst, a type of landscape made of limestone, dolomite, and gypsum rocks that slowly dissolve in the presence of water with a slightly acidic tinge. rain mixes with carbon dioxide in the atmosphere as it falls to the ground and then picks up more of the gas as it seeps into the soil. retina wallpapers. the combination is a weak acidic solution that dissolves calcite, the main mineral of karst rocks. the acidic water percolates down into the earth through cracks and fractures and creates a network of passages like an underground plumbing system. the passages widen as more water seeps down, allowing even more water to flow through them. eventually, some of the passages become large enough to earn the distinction of ultimate cave. most of these solutional caves require more than 100,000 years to widen large enough to hold a human.
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