Texture (geology) — 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 feature level. This includes the geometric aspects and relations… … Wikipedia
Volcanic rock — is an igneous rock of volcanic origin. Texture Volcanic rocks are usually fine grained or aphanitic to glassy in texture. They often contain clasts of other rocks and phenocrysts. Phenocrysts are crystals that are larger than the matrix and are… … Wikipedia
List of rock textures — This page is intended to be a list of rock textural and morphological terms. A * Adcumulate * Agglomeritic * Adamantine a type of lustre * Amygdaloidal * Anhedral * Antitaxial veins * Aphanitic * Aplitic; aplite * Augen textured gneiss *… … Wikipedia
sinter — /sin teuhr/, n. 1. siliceous or calcareous matter deposited by springs, as that formed around the vent of a geyser. 2. Metall. the product of a sintering operation. v.t. 3. Metall. to bring about agglomeration in (metal particles) by heating.… … Universalium
Lake Superior agate — The Lake Superior agate is a type of agate stained by iron and found on the shores of Lake Superior. Its wide distribution and iron rich bands of color reflect the gemstone s geologic history in Minnesota. In 1969 the Lake Superior agate was… … Wikipedia
Vesicle — may refer to:* Synaptic vesicle * Auditory vesicle * Optic vesicles * Seminal vesicle * Subsporangial vesicle * Vesical arteries * Vesicle (biology), a relatively small and enclosed compartment within a cell * Vesicle (dermatology), a liquid… … Wikipedia
Case hardening of rocks — Case hardening is a weathering phenomenon of rock surface induratoin. It is observed commonly in: felsic alkaline rocks, such as nepheline syenite, phonolite and trachyte; pyroclastic rocks, as pyroclastic flow deposit, fine air fall deposits and … Wikipedia
igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary … Universalium
Lava — flow redirects here. For the programming anti pattern, see Lava flow (programming). For other uses, see Lava (disambiguation) … Wikipedia
Basalt — For the World War II raid, see Operation Basalt. For the cities, see Basalt, Colorado and Basalt, Idaho. Basalt Igneous Rock Composition … Wikipedia
