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Encyclopedia > Breccia

Breccia, derived from the Latin word for "broken," is a sedimentary rock composed of angular fragments in a matrix that may be of a similar or a different material. Latin was the language originally spoken in the region around Rome called Latium. ... Two types of sedimentary rock: limey shale overlaid by limestone. ...

Fault breccias result from the grinding action of two fault blocks as they slide past each other. Subsequent cementation of these broken fragments may occur by means of mineral matter introduced by groundwater. Talus slopes may become buried and the talus cemented in a similar manner. Old fault exposed by roadcut near Harrisburg, Pennsylvania. ... In geology, cementation is the process of deposition of dissolved mineral components in the interstices of sediments. ... Minerals are natural compounds formed through geological processes. ... Groundwater is water flowing within aquifers below the water table. ... Talus (which is Latin for ankle-bone), has several meanings: in mountaineering and climbing, talus is small broken rock found on mountain slopes and at the base of cliffs. ...

Volcanic breccias result from the cementation of fragments that have been broken by volcanic action. Sometimes the surface of a lava flow will harden while the interior will remain liquid; the fracturing of the surface layer and its subsequent cementation by uncooled lava produces flow breccia. A volcano is a geological landform (usually a mountain) where magma (rock of the earths interior made molten or liquid by high pressure and temperature) erupts through the surface of the planet. ... Lava is molten rock that a volcano expels during an eruption. ...

The intrusion of plutonic rocks will often shatter the invaded country rock, producing a shatter breccia. In the case of plutonic rocks partly cooled and subsequently broken by further invasions of magma, intrusive breccias are formed. These shatter breccias may be mineralized by later hydrothermal fluids. Pluton redirects here. ... This article is about the type of molten rock. ... Hydrothermal circulation in the oceans is the passage of the water through mid-ocean Ridge (MOR) systems. ...

Impact breccias are thought to be diagnostic of an impact event such as an asteroid or comet striking the earth, and are usually found at impact craters. Artists impression of a major impact event. ... An asteroid is a small, solid object in our Solar System, orbiting the Sun. ... Comet Hale-Bopp, showing a white dust tail and blue gas tail (February 1997) A comet is a small astronomical object similar to an asteroid but composed largely of ice. ... This article is about impact craters, also known as meteor craters. ...

Uses of breccia

Breccia statue of the ancient Egyptian goddess Tawaret

The striking visual appearance of breccias has for millennia made them a popular sculptural and architectural material. Breccia was used on a limited scale by the ancient Egyptians - one of the best-known examples is the statue of the goddess Tawaret in the British Museum). It was regarded by the Romans as an especially precious stone and was often used in high-profile public buildings. Many types of marble are brecciated, such as Breccia Oniciata or Breche Nouvelle. Tawaret - statue in breccia in the British Museum, London Image by ChrisO File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Tawaret - statue in breccia in the British Museum, London Image by ChrisO File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Statue of Tawaret Tawaret (The Great One; also rendered as Taurt, Taueret, Ta-weret, Taweret, Thoeris, Opet, Apet, Rert, or Reret) was a popular deity in ancient Egyptian mythology. ... Ancient Greeks depiction of ideal form of the body is expressed through sculpture such as this one. ... Architecture (in Greek αρχή = first and τέχνη = craftsmanship) is the art and science of designing buildings and structures. ... Map of Ancient Egypt Ancient Egypt was the civilization of the Nile Valley between about 3000 BC and the conquest of Egypt by Alexander the Great in 332 BC. As a civilization based on irrigation, it is the quintessential example of a hydraulic empire. ... Statue of Tawaret Tawaret (The Great One; also rendered as Taurt, Taueret, Ta-weret, Taweret, Thoeris, Opet, Apet, Rert, or Reret) was a popular deity in ancient Egyptian mythology. ... The main entrance to the British Museum The British Museum is one of the worlds greatest and most famous museums. ... Ancient Rome was a civilization that existed in Europe between 753 BC and its downfall in AD 476. ... Marble This page is about the metamorphic rock. ...

It is most often used as an ornamental or facing material in walls and columns. A particularly striking example can be seen in the Pantheon in Rome, which features two gigantic columns of pavonazzetto, a breccia coming from Phrygia (in modern Turkey). Pavonazzetto obtains its name from its extremely colourful appearance, which is reminiscent of a peacock's feathers (pavone is "peacock" in Italian). The Pantheon, Rome The Pantheon is a building in Rome which was originally built as a temple to all the gods of the Roman state religion, but has been a Christian church since the 7th century AD. It is the only building from the Greco-Roman world which is completely... In antiquity, Phrygia was a kingdom in the west central part of the Anatolian highlands, part of modern Turkey. ... Peacock re-directs here; for alternate uses see Peacock (disambiguation). ...

  Results from FactBites:
Breccia - LoveToKnow 1911 (796 words)
In caves breccias of limestone are produced by the collapse of part of the roof, covering the floor with broken masses.
Another group of breccias is due to crushing; these are produced in fissures, faults and veins, below the surface, and may be described as "crush-breccias" and "friction-breccias." Very important and well-known examples of this class occur as veinstones, which may be metalliferous or not.
A third group of breccias is due to movement in a partly consolidated igneous rock, and may be called "fluxion-breccias." Lava streams, especially when they consist of rhyolite, dacite and some kinds of andesite, may rapidly solidify, and then become exceedingly brittle.
La Historieta Argentina (860 words)
VITO NERVIO, Leonardo Wadel - Alberto Breccia, Patoruzito, 1949
Breccia inherited this strip, first drawn by Emilio Cortinas, in 1947, and draw it for over ten years, giving the detective a tougher side, still with a classical comic style he already explored new and daring framings.
Breccia and Sasturain started to work on this comic in 1982, as the army still ruled the country, and it is considered the best comic about Argentina during the dictatorship years, even out of its genre limits.
  More results at FactBites »



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