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A stalactite (UK: / ˈ s t æ l ə k ˌ t aɪ t /, US: / s t ə ˈ l æ k t aɪ t /; from Ancient Greek σταλακτός (stalaktós) 'dripping', from σταλάσσειν (stalássein) 'to drip') [1] is a mineral formation that hangs from the ceiling of caves, hot springs, or man-made structures such as bridges and mines.
Calthemite straw stalactite growing from the concrete ceiling of an undercover car-park Calthemite straw stalactites, the rightmost example demonstrating bending due to the direction of air currents during its formation. Calthemite is a secondary deposit, derived from concrete, lime, mortar or other calcareous material outside the cave environment.
It is thought to have originated from the Greek word korōnis, meaning "cornice" [1] or "ornamental molding". [8] There is also speculation of the origin to stem from the Arabic word qarnasi meaning "intricate work". [9] Nişanyan claims that it is related to the Aramaic קרנסא, meaning "hammering". [10]
With its spectacular stalactite formations and crystal-clear waters, this geological marvel has been sculpted by nature's hand over millions of years, creating an enchanting world beneath the surface.
The oil from human fingers causes the flowing water to avoid the area, which then dries out. Flowstones are also good identifiers of periods of past droughts, since they need some form of water to develop; the lack of that water for long periods of time can leave traces in the rock record via the absence or presence of flowstones, and their ...
Among the construction trades, in most industrialized countries, each has a distinct 2-5 year craft apprenticeship education and usually once started a worker remains in a single craft and progresses through ranks of skill for the duration of their career (pre-apprentice, apprentice, and journeyman; some countries include a post-journeyman ...
The chemical reaction which creates the rafts, involves carbon dioxide (CO 2) being absorbed (diffusing) into solution from the atmosphere and calcium carbonate (CaCO 3) precipitates as rafts or deposited as a stalagmite, stalactite or flowstone. [9] This chemistry is very different to that which creates speleothems in caves.
Data from the U.S. Census Bureau shows that 2024 new home sales hit their highest level since 2020. Here’s what the data might mean for the sluggish housing market.