For thousands of years, the striking visual appearance of breccias has made them a popular sculptural and architectural material. Breccia was used for column bases in the Minoan palace of Knossos on Crete in about 1800 BC. [38]

Most breccias are a mix of rock fragments and mineral grains. The type of rock that the fragments were produced from is often used as an adjective when referring to the rock. Some examples: sandstone breccia, limestone breccia, granite breccia, chert breccia, basalt breccia, and others.

2023年9月4日 · There are many different names of breccias. It given names to common used when referring to a rock or rock debris made up of angular fragments. Although it is mainly used for rocks of sedimentary origin, it can be used for other types of rocks. Collapse Breccia: Crushed rock that reason from a cavern or magma chamber collapse.

Breccia, lithified sedimentary rock consisting of angular or subangular fragments larger than 2 millimetres (0.08 inch). It differs from a conglomerate, which consists of rounded clasts. A brief treatment of breccias follows. For full treatment, see sedimentary rock: Conglomerates and …

Breccias are very important host rocks for mineralisation, not only because,of the large surface area they make available for water-rock interaction and the fact that they represent zones of high permeability, but some of the processes of brecciation such as hydraulic fracturing can closely related to the process of mineralisation ...

2018年6月1日 · The study of these breccias (meteorite or impact breccias) helps in understanding impact processes on planetary bodies, resulting structures and evolutionary history, which in turn enhance our understanding over early solar system processes of accretion, differentiation, and surface evolution (Bischoff and Stöffler, 1992).

2005年7月9日 · These breccias are generally referred to as sedimentary breccias and cataclastic (or fault) breccias, respectively. However, many breccias, including those used as gemrocks, have been formed as the result of other processes -- e.g., desiccation, which involves cracking as the result of dehydration or drying an subsequent filling of the cracks ...

1997年12月1日 · Breccias are among the most widely distributed rock textures found in hydrothermal vein-type deposits. Previous studies have mainly been interested in developing qualitative descriptive approaches, leading to a confusing profusion of terms.

2021年11月26日 · The lunar regolith breccias consist of two distinct lithologies: glass spherules and agglutinates. Glass spherules can be produced either by rock melted during the impact and ejected in form of small globs that are rapidly quenched or by erupting volcanoes.

“Igneous,” “flow,” or “pyroclastic” breccias are rocks composed of angular fragments of preexisting igneous rocks of pyroclastic debris ejected by the volcanic blast or pyroclastic flow. An outstanding example would be an intrusion of gabbroic magma within the preexisting ultramafic rocks hosting layered chromite at Nausahi, India ...