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A magma chamber is a large pool of liquid rock beneath the surface of the Earth. The molten rock, or magma , in such a chamber is less dense than the surrounding country rock , which produces buoyant forces on the magma that tend to drive it upwards. [ 1 ]
Among the modern Hopi and most other Pueblo peoples, "kiva" means a large room that is circular and underground, and used for spiritual ceremonies and a place of worship. Similar subterranean rooms are found among ruins in the Southwestern United States , indicating uses by the ancient peoples of the region including the ancestral Puebloans ...
A hypogeum or hypogaeum (plural hypogea or hypogaea, pronounced / h aɪ p ɒ ɡ eɪ ə /; literally meaning "underground", from Greek hypo (under) and ghê (earth) [1]) is an underground temple or tomb. Hypogea will often contain niches for cremated human remains or loculi for buried remains. Occasionally tombs of this type are referred to as ...
The underground structure may have originated from a natural cave, expanded over time by cutting directly into the rock with crude tools including antlers, flint, chert and obsidian. [17] Burial chambers in the upper level of the Hypogeum date from the early phases of the Maltese Temple Period, with lower chambers dating from later. [6]
Carlsbad Cavern includes a large limestone chamber, named simply the Big Room, which is almost 4,000 ft (1,220 m) long, 625 ft (191 m) wide, and 255 ft (78 m) high at its highest point. The Big Room is the largest chamber in North America and the 32nd largest in the world.
A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater flows for basic sewage treatment. [2] Settling and anaerobic digestion processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as "primary treatment"). [2]
Israeli forces located what they said was the largest weapons production site so far found in Gaza, with underground workshops they said were used to produce long-range missiles capable of hitting ...
The largest known room by surface is Sarawak Chamber, in the Gunung Mulu National Park (Miri, Sarawak, Borneo, Malaysia), a sloping, boulder strewn chamber with an area of 154,500 m 2 (1,663,000 sq ft). [20] The largest room in a show cave is the Salle de la Verna in the French Pyrenees.