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The grain size of plutonic rocks is generally coarse, with individual mineral grains typically larger than 1 mm in size. This is due to the slow cooling and crystallization process of magma beneath the Earth's surface, allowing for the growth of larger crystals.

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1y ago

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Which of the following is a common plutonic igneous rock?

The most common plutonic igneous rock is granite. There are various types of granite based on whether the rock cooled above or below the surface of the earth. The major differences among these types of granitic rock is their crystalline structure.


What is a small grain size rock?

clay


What sedimetary rock has the smallest grain size?

Shale is a sedimentary rock that typically has the smallest grain size due to its fine-grained and compacted nature.


What is grain according to geologists?

Grain refers to particle or crystal size in rock.


Why do plutonic rock and volcanic rock have big and small crystals respectively?

The size of the crystals is a function of the rate of cooling of the molten rock. The faster the molten rock cools, the smaller the crystals will be.


What are 3 characteristics of a rock?

1.Grain Size 2.Grain Shape 3.Grain Pattern


What solidifies into plutonic rock?

magma


Which features tells you how large the grains of a sedimentary rock are?

The size of the grains in a sedimentary rock can be determined by examining the texture of the rock. Coarser grains indicate a larger grain size, while finer grains indicate a smaller grain size. Other features that can provide clues to grain size include the sorting (uniformity of grain sizes) and rounding of the grains.


What else does rock texture include besides grain size and arrangement?

Grain shape.


Which process changes the grain Size of a metamorphosis rock?

The process that changes the grain size of a metamorphic rock is called metamorphism, which occurs when existing rocks are subjected to extreme heat and pressure over time. This environment causes the minerals within the rock to recrystallize, resulting in a change in grain size and texture. Additionally, the rate of cooling and the duration of pressure can further influence the final grain size of the metamorphic rock.


What is molten rock that squeezes into existing rock and cools?

A plutonic intrusion.Igneous rock.


What rock has the finest grain size?

The rock with the finest grain size is typically shale. Shale is a sedimentary rock composed of clay particles that are less than 1/256 millimeter in diameter, giving it a very fine texture. This fine grain size allows shale to split easily into thin layers, which is a characteristic feature of the rock.