#igneouspetrology — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #igneouspetrology, aggregated by home.social.
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Point counting (geology) (Geology ⛰️)
In geology, point counting is a method to determine the proportion of an area that is covered by some objects of interest. In most cases the area is a thin section or a polished slab. The objects of interest vary between subdisciplines and can for example be quartz or feldspar grains in sedimentology, any type...
https://en.wikipedia.org/wiki/Point_counting_(geology)
#PointCounting #Geology #Petrology #Geostatistics #IgneousPetrology #GeologicalTechniques
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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
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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...