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Breccia - Wikipedia


Breccia is a rock composed of broken fragments of minerals or rock cemented together by a fine-grained matrix that can be similar to or ...

Breccia - Geology - rocks and minerals


Cataclastic breccias are produced by the fragmentation of rocks during faulting. Volcanic breccias (agglomerates) comprise blocks of lava in an ash matrix and ...



Volcanic breccias are grouped into three major categories based upon process of fragmentation: autoclastic, pyroclastic, and epiclastic. Autoclastic volcanic ...

Breccia: Sedimentary Rock - Pictures, Definition, Formation


Breccia is a clastic sedimentary rock similar to conglomerate that can form in a variety of ways. ... What Is Breccia, How Does It Form, and What Is Its Composition? ... of igneous rock debris that was ejected by a volcanic blast or pyroclastic flow. ... or rock material, it is fairly safe to assume that it means angular -shaped pieces.

Pyroclastic Textures


A rock with a pyroclastic texture is termed a tuff if the largest fragments are less than 2.5 inches long, a volcanic breccia if the fragments are larger. ... above shows the angular nature of the clasts (the volcano did explode, after all) and the very ...

BRECCIA - Mineral Gallery


Meteorite impact craters can form breccias as the meteor impacts the Earth and the ... In conglomerates, the grains are rounded and usually indicate that they have ... rocks that produce angular fragments that solidify with a breccia-like texture.

Breccia facts, information, pictures | Encyclopedia.com articles about ...


Volcanic breccias containing lithic (rock) and vitric (glass and pumice ) fragments ... Milling or wear abrasion during displacement on faults may result in further ...

Breccia ~ Learning Geology


Mar 16, 2015 ... This website uses cookies to ensure you get the best experience on our ... Breccia is a clastic sedimentary rock which consists of large angular fragments. ... rock debris that was ejected from volcanic blast or pyroclastic flow.

volcanic breccia | geology | Britannica.com


Volcanic breccia ... Alternative Titles: igneous breccia, pyroclastic breccia ... Upon accumulation, blocks form breccia, which are solid angular fragments larger than 64 mm. ... A geologist uses a rock hammer to sample active pahoehoe lava for ...

Popular Q&A
Q: Mt. Rainier's History | USA Today
A: It is part of the so-called Ring of Fire volcanic range that nearly encircles the Pacific ... Thin lava flows embedded with breccia (cemented rock fragments) a... Read More »
Source: www.ehow.com
Q: Common rocks found in south texas? | Yahoo Answers
A: Dec 14, 2007 ... Near Sabinal there are outcrops of volcanic breccias. You can find olivine in these breccias. Also in this area there are volcanic intrusive r... Read More »
Source: answers.yahoo.com
Q: What is deposition of rocks? | Yahoo Answers
A: Volcanic processes form extrusive igneous rocks. ... from 2mm to 4 meters in diameter), and breccia is made up of angular, sharp-edged, gravel-sized clasts. Read More »
Source: sg.answers.yahoo.com
Q: What types of rocks only form from cataclastic metamorphism? - Qu...
A: Feb 24, 2014 ... The very creatively named cataclasite. :) Cataclasites are classified into ... Fault Breccia may also be melted by friction heat between the r... Read More »
Source: www.quora.com
Q: How did the scientists know that the moon was part of the earth ....
A: Analysis of the rocks brought back by the Apollo missions. Lunar Sample Overview. Apollo 11 ... On Earth, basalts are a common type of volcanic rock and are f... Read More »
Source: www.quora.com