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The Great Blue Hole, a giant submarine sinkhole, near Ambergris Caye, Belize The following is a list of sinkholes , blue holes , dolines , crown holes , cenotes , and pit caves . A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer.
The Red Lake sinkhole in Croatia. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet.
A pit latrine generally consists of three major parts: a hole in the ground, a concrete slab or floor with a small hole, and a shelter. [7] The shelter is also called an outhouse. [10] The pit is typically at least three meters (10 ft) deep and one meter (3 ft) across. [7]
The freezing level in the atmosphere is also lower in the winter, meaning the holes would be easier to see from someone on the ground. Fallstreak holes seen on satellite imagery over Florida on ...
Hole types in engineering: blind (left), through (middle), interrupted (right). In engineering, machining, and tooling, a hole may be a blind hole or a through hole (also called a thru-hole or clearance hole). A blind hole is a hole that is reamed, drilled, or milled to a specified depth without breaking through to the other side of the ...
Putlog holes in Cardiff castle. Putlog holes or putlock holes [1] are small holes made in the walls of structures to receive the ends of poles (small round logs) or beams, called putlogs or putlocks, to support a scaffolding. [2] Putlog holes may extend through a wall to provide staging on both sides of the wall.
A borehole is a narrow shaft bored in the ground, either vertically or horizontally. A borehole may be constructed for many different purposes, including the extraction of water ( drilled water well and tube well ), other liquids (such as petroleum ), or gases (such as natural gas ).
It is called preauricular sinus which, according to the U.S. National Institutes of Health, or NIH, "generally appears as a tiny skin-lined hole or pit, often just in front of the upper ear where ...