Cataclastic rocks contain angular fragments formed by cataclasis. Cataclasis is a deformation of the rock caused by fracture and rotation of aggregates or mineral grains. A mineral is a naturally occurring substance formed through geological processes that has a characteristic chemical composition a highly ordered atomic structure and specific

The term cataclastic refers to the structure produced in a rock by the actions of severe mechanical stresses that occur during metamorphism. Metamorphism can be defined as the solid state recrystallisation of pre-existing rocks due to changes in heat and/or pressure and/or introduction of fluids i Characteristic features of cataclastic metamorphism include the bending, breaking, and granulation of minerals. Metamorphism can be defined as the solid state recrystallisation of pre-existing rocks due to changes in heat and/or pressure and/or introduction of fluids i

Cataclastic structures, also called mortar structures, or "porphyroclastic," are granites and gneisses that are produced by dynamic metamorphism of crystalline rock, and are characterized by mica-free aggregates of small finely-crushed grains of quartz or feldspar that fill the interstices between larger individual relicts and thus resemble stones set in mortar. Granite (ˈɡrænɪt is a common and widely occurring type of intrusive, Felsic, igneous rock. Gneiss (ˈnaɪs is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from preexisting formations that were originally In Materials science, a crystal is a Solid in which the constituent Atoms Molecules or Ions are packed in a regularly ordered repeating The word "mica" is thought to be derived from the Latin word la micare, "glitteren" in reference to the brilliant appearance of this mineral (especially Quartz (from German) is the most abundant Mineral in the Earth 's Continental crust (although Feldspar is more common in Feldspar is the name of a group of rock-forming Minerals which make up as much as 60% of the Earth 's crust.

Porphyroclastic refers to the metamorphic texture characterized by large strained metacrysts within a finely recrystallized matrix of neoblasts that are free of strain. Texture in Geology refers to the physical appearance or character of a rock such as grain size shape arrangement and pattern at both the megascopic or microscopic surface In Chemistry a Molecule experiences strain when in a Chemical conformation there exist unfavorable bond angles or bond distances Crystallization is the (natural or artificial process of formation of solid Crystals precipitating from a homogeneous --> identical Solution The matrix or groundmass of rock is the fine-grained mass of material in which larger grains or Crystals are embedded

See also

• pyroclastic

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