Flow banding (Volcanology 🌋)
Flow banding is a geological term to describe bands or layers that can sometimes be seen in rock that formed from magma. Flow banding is caused by friction of the viscous magma that is in contact with a solid rock interface, usually the wall rock to an intrusive chamber or, if the magma is erupted, the surface of the Earth across which the lav...
https://en.wikipedia.org/wiki/Flow_banding
#FlowBanding #Volcanology #IgneousRocks #IgneousPetrology #StructuralGeology
Lava coil (Volcanology 🌋)
A lava coil is a spiral or scroll-shaped lava formation occurring when relatively low viscosity lava such as Pahoehoe solidifies along a slow-moving shear zone in the flow. The shear produces a Kelvin–Helmholtz instability that forms spiral-shaped patterns. Depending on the side of the flow the spiral is clockwise or anti-clockwise. They have been observed on flows near Kilauea on Hawai'i...
Laccolith (Petrology 💎)
A laccolith is a body of intrusive rock with a dome-shaped upper surface and a level base, fed by a conduit from below. A laccolith forms when magma rising through the Earth's crust begins to spread out horizontally, prying apart the host rock strata. The pressure of the magma is high enough that the overlying strata are forced upward, giving the l...
https://en.wikipedia.org/wiki/Laccolith
#Laccolith #Petrology #Laccoliths #IgneousRocks #GeologicDomes #SheetIntrusions
An immense reservoir of liquid water may reside deep under the surface of Mars within fractured #IgneousRocks, holding enough to fill an #ocean that would cover the entire surface of #Earth's planetary neighbor.
That is the conclusion of scientists based on seismic data obtained by #NASA's robotic #InSightLander during a mission that helped decipher the interior of Mars.
#SeismicData indicates huge #UndergroundReservoir of #LiquidWater on #Mars
https://www.msn.com/en-us/news/technology/seismic-data-indicates-huge-underground-reservoir-of-liquid-water-on-mars/ar-AA1oGBAi
Large igneous province (Geomorphology 🏞️)
A large igneous province is an extremely large accumulation of igneous rocks, including intrusive and extrusive, arising when magma travels through the crust towards the surface. The formation of LIPs is variously attributed to mantle plumes or to processes associated with divergent plate tectonics. The formation o...
https://en.wikipedia.org/wiki/Large_igneous_province
#LargeIgneousProvince #Orogeny #Petrology #Volcanology #FloodBasalts #IgneousRocks
Large igneous province (Petrology 💎)
A large igneous province is an extremely large accumulation of igneous rocks, including intrusive and extrusive, arising when magma travels through the crust towards the surface. The formation of LIPs is variously attributed to mantle plumes or to processes associated with divergent plate tectonics. The formation of som...
https://en.wikipedia.org/wiki/Large_igneous_province
#LargeIgneousProvince #Orogeny #Petrology #Volcanology #FloodBasalts #IgneousRocks
QAPF diagram (Petrology 💎)
A QAPF diagram is a doubled-triangle plot diagram used to classify intrusive igneous rocks based on their mineralogy. The acronym QAPF stands for "Quartz, Alkali feldspar, Plagioclase, Feldspathoid ", which are the four mineral groups used for classification in a QAPF diagram. The percentages of the Q, A, P and F groups are normalized, i.e., recalculated so that th...
Lopolith (Petrology 💎)
A lopolith is a large igneous intrusion which is lenticular in shape with a depressed central region. Lopoliths are generally concordant with the intruded strata with dike or funnel-shaped feeder bodies below the body. The term was first defined and used by Frank Fitch Grout during the early 1900s in describing the Duluth gabbro complex in northern Minnesota and adjacent Onta...
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