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What is the size shape and arrangement of mineral grains in a rock?

What is the size shape and arrangement of mineral grains in a rock?

Answer: Texture is the description of the size, shape, and arrangement of the mineral grains in a rock.

What is the grain size of a rock?

Note: Texture and structure, collectively referred to as fabric, are of primary importance in determining which major rock group a particular rock specimen belongs to. Grain size: Refers to the size of individual mineral crystals or clasts (pieces of pre-existing rock) in a rock.

What do the size shape and positions of the grains that make up a rock determine?

The size, shape, and positions of the grains that make up a rock determine a rock’s texture. Sedimentary rock can have a fine- grained, medium-grained, or coarse-grained texture, depending on the size of the grains that make up the rock.

Which of these can determine the size of grains in igneous rocks?

The size of grains in igneous rocks is mainly determined by how quickly the magma cooled down.

What is the size and arrangement of crystals in igneous rock called?

texture
The term texture applies to the overall appearance of the rock based on the size and arrangement of the interlocking crystals. Textural terms include: APHANITIC TEXTURE – Igneous rocks that form on the earth’s surface have very fine-grained texture because the crystals are too small to see without magnification.

What is the shape of sedimentary rocks?

sedimentary rocks Particles can be spherical, prismatic, or bladelike.…

What are the 3 major texture categories quizlet?

Igneous rock, sedimentary rock and metamorphic rock.

What kind of metamorphic rock has its mineral grains arranged in planes or bands?

Chapter 6: Rocks (Flashcards, Matching, Concentration, Word Search)

A B
foliation the metamorphic rock texture in which mineral grains are arranged in planes or bands
nonfoliated the metamorphic rock texture in which mineral grains are not arranged in planes or bands

Which of these can determine the size of grains in igneous rocks quizlet?

-state of thickness . determines grain size . rock formed from viscous lava is more likely to be finer grained than one formed from more fluid lava. -coarse-grained, reflecting the slow cooling and solidification of magma.

How are grains used to describe igneous rocks?

The size and arrangement of mineral crystals, also referred to as grains, define the texture of the rock. Geologists use mineral and textural classifications to infer information about the environmental setting in which different igneous rocks are formed.

When do coarse grains develop in aphanitic rocks?

Aphanitic is the term used to describe very fine grained rocks. Porphyritic textured rocks contain both a coarse and fine-grained texture. The coarse grains in a porphyritic rock begin to develop as the magma is cooling below the surface of the earth. Following eruption or exposure to

What kind of texture does granite rock have?

MOST granite has the texture called ‘hypidiomorphic granular’, which means that all the minerals in the rock (and granite is made up of feldspar, mica and quartz) are all about the same size. Such a rock will still be ‘phaneritic’ and all the mineral grains will be at least big enough to be discerned without a microscope.

What do you call the texture of rock?

We call that ‘texture’. There are various terms for different ‘textures’ which refer to the size and shapes and relative sizes (arrangements) of the mineral crystals in an igneous rock. Unfortunately for the general public, the terms are mainly scientific words derived from Greek.