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- Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form intrusions, such as batholiths, dikes, sills, laccoliths, and volcanic necks.en.wikipedia.org/wiki/Intrusive_rockintrusive rock, igneous rock formed from magma forced into older rocks at depths within the Earth’s crust, which then slowly solidifies below the Earth’s surface, though it may later be exposed by erosion. Igneous intrusions form a variety of rock types. See also extrusive rock.www.britannica.com/science/intrusive-rockIntrusive, or plutonic, igneous rock forms when magma is trapped deep inside the Earth. Great globs of molten rock rise toward the surface. Some of the magma may feed volcanoes on the Earth's surface, but most remains trapped below, where it cools very slowly over many thousands or millions of years until it solidifies.www.usgs.gov/faqs/what-are-igneous-rocksIgneous rocks which form by the crystallization of magma at a depth within the Earth are called intrusive rocks. Intrusive rocks are characterized by large crystal sizes, i.e., their visual appearance shows individual crystals interlocked together to form the rock mass.hyperphysics.phy-astr.gsu.edu/hbase/Geophys/intr…In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth.en.wikipedia.org/wiki/Igneous_intrusion
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Intrusive rock - Wikipedia
Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form intrusions, such as batholiths, dikes, sills, laccoliths, and volcanic necks. Intrusion is one of the two ways igneous rock can form. The other is extrusion, such as a volcanic eruption or similar event. … See more
Because the solid country rock into which magma intrudes is an excellent insulator, cooling of the magma is extremely slow, and intrusive igneous rock is coarse-grained (phaneritic). However, the rate of cooling is greatest … See more
Plutonic rocks form 7% of the Earth's current land surface. Intrusions vary widely, from mountain-range-sized batholiths to thin veinlike fracture fillings of aplite See more
Intrusive rocks are characterized by large crystal sizes, and as the individual crystals are visible, the rock is called phaneritic. There are few indications of flow in intrusive rocks, since their texture and structure mostly develops in the final stages of … See more
Wikipedia text under CC-BY-SA license Intrusive rock | geology | Britannica
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Igneous intrusion - Wikipedia
Igneous Rocks | Pictures of Intrusive and Extrusive …
WEBIntrusive igneous rocks are formed from the solidification of molten rock material below Earth's surface, while extrusive igneous rocks are formed from the solidification of molten rock material on or above …
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WEBIgneous rock - Intrusive, Magma, Plutonic: Erosion of volcanoes will immediately expose shallow intrusive bodies such as volcanic necks and diatremes (see Figure 6). A volcanic neck is the “throat” of a …
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WEBJun 6, 2018 · Intrusive rock is formed when magma from deep underground cools and solidifies to form rocks with large crystals. The speed of cooling determines the texture and appearance of the …
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