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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. An … 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 … 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 … See more
Wikipedia text under CC-BY-SA license Types of Rocks – Igneous, Sedimentary, Metamorphic
WEBJul 9, 2023 · Intrusive igneous rocks form when magma cools and solidifies beneath the Earth’s surface. The slow cooling that occurs there allows large crystals to form. Examples of this type of rock include granite, diorite, …
Igneous Rocks | Pictures of Intrusive and Extrusive …
WEBLearn about the formation, composition, and examples of intrusive and extrusive igneous rocks. See photos and descriptions of common igneous rock types such as granite, basalt, obsidian, and more.
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4.9: Intrusive and Extrusive Igneous Rocks - K12 …
WEBJan 11, 2021 · Pictured below are four types of intrusive rocks (Figure below). (A) This granite has more plagioclase feldspar than many granites. (B) Diorite has more dark-colored minerals than granite.
3: Intrusive Igneous Rocks - Geosciences LibreTexts
4.1: Classification of Igneous Rocks - Geosciences …
WEBIgneous rocks are common in the geologic record, but surprisingly, it is the intrusive rocks that are more common. Extrusive rocks, because of their small crystals and glass, are less durable. Plus, they are, by definition, …
Igneous rock - Intrusive, Magma, Plutonic | Britannica
WEBintrusive igneous rock. Figure 6: Forms of intrusive igneous rock bodies in hypothetical sections of Earth strata. Note the change of scale from A through D. (more) Erosion of volcanoes will immediately expose shallow …
4.4 Intrusive Igneous Rocks – Principles of Earth Science
WEB4.4 Intrusive Igneous Rocks – Principles of Earth Science. In most cases, a body of hot magma is less dense than the rock surrounding it, so it has a tendency to creep upward toward the surface. It does so in a few …
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