Is coarse grain a term that describes a rocks grain pattern?

Is coarse grain a term that describes a rocks grain pattern?

A. An example of a coarse-grained rock is diorite. Coarse-grain is a term that describes a rock’s grain pattern. False. Circle the letter of choice that determines the grain shape of a rock such as granite.

What is coarse-grained rock?

(a) Said of a crystalline rock, and of its texture, in which the individual minerals are relatively large; specif. said of an igneous rock whose particles have an average diameter greater than 5 mm (0.2 in.).

What terms are used to describe the grain pattern of a rock?

major reference. The texture of a rock is the size, shape, and arrangement of the grains (for sedimentary rocks) or crystals (for igneous and metamorphic rocks). Also of importance are the rock’s extent of homogeneity (i.e., uniformity of composition throughout) and the degree of isotropy.

What are the grains in rocks called?

Sedimentary Rock forms from particles, called sediment, that are worn off other rocks. The particles are sand, silt, and clay.

What term is used for coarse-grained igneous rocks?

phaneritic
Coarse grain varieties (with mineral grains large enough to see without a magnifying glass) are called phaneritic. Granite and gabbro are examples of phaneritic igneous rocks.

Which is a description of the grain pattern of gneiss?

Gneiss is a medium- to coarse-grained, semischistose metamorphic rock. It is characterized by alternating light and dark bands differing in mineral composition (coarser grained than schist). The lighter bands contain mostly quartz and feldspar, the darker often contain biotite, hornblende, garnet or graphite.

What is meant by the term coarse grained?

having a coarse texture or grain. indelicate; crude; vulgar; gross: a coarse-grained person with vulgar manners.

What term is used for coarse grained igneous rocks?

What do you understand by the terms texture and structure of rocks?

the nature of the makeup of rocks from minerals and mineral aggregates. Texture is determined by the dimensions, shape, and interrelationships of the minerals; structure depends on the general features and spatial arrangement of the larger components of the rock (mineral aggregates).

What is the coarse grain of a rock?

TRUE OR FALSE: coarse grain is a term that describes a rock’s grain pattern. false What determines the grain shape of a rock, such as granite? The shape of the rock’s crystals.

What’s the difference between course and fine grain?

Grain size is course grained or fine grained. Course grain is grain that is easy to see while fine grain is grain that can only be seen with a microscope. Grain shape is the shape of the grain it can vary from rounded in a conglomerate to jagged in breccia. Grain pattern is the grains pattern.

What kind of rock has no grain pattern?

Grain pattern is the grains pattern. Banded grain is grains in layers or bands such as gneiss while non-banded grain is grains with no pattern such as quartzite. What are the three groups of rocks and how are they formed?

How is the texture of a rock determined?

Texture is the look and feel of a rocks surface, determined by the size, shape, and pattern of a rocks grains. Three ways scientists describe texture is by grain size, grain shape, and grain pattern. Grain size is course grained or fine grained.