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Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...
Flute – in geology, process of differential weathering and erosion that produces a corrugated surface of ridges or flutes; Honeycomb weathering – Form of cavernous weathering and subcategory of tafoni; Inselberg – Isolated, steep rock hill on relatively flat terrain
Four methods of nomenclature are used: [3] [5] The initial letters of a name, for example: cyanotrichite: Cya and mitscherlichite: Mits. A combination considered characteristic of the mineral name, for example: ewingite: Ewg and neighborite: Nbo. A selection of letters expressing components of the name, for example: adranosite = Arn and ...
Solidified lava flow in Hawaii Sedimentary layers in Badlands National Park, South Dakota Metamorphic rock, Nunavut, Canada. Geology (from Ancient Greek γῆ (gê) 'earth' and λoγία () 'study of, discourse') [1] [2] is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. [3]
6 Geology. 7 History. 8 Languages. ... Tigers Are Great Cats, first letters of the word pairs (T-A, G-C) stand for base pairs. To memorise the types of antibodies
Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...
Geology portal; Earth sciences portal; List of minerals – List of minerals with Wikipedia articles; List of rocks on Mars – Alphabetical list of named rocks and meteorites found on Mars; Rock cycle – Transitional concept of geologic time; List of rock formations: for a list of unusual or culturally significant rock outcrops
2. In geology, an intrusion in which molten rock has ascended through an approximately vertical fissure and solidified into a wall of rock that is often harder or less permeable than the rocks of the surrounding strata. [4] diocese A type of administrative division used by certain Christian churches for religious purposes. direction