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This question has a very complex answer and you would do best to look at a chart, in order to have a full grasp of the answer. There are several categories and subcategories, so the answer can vary, depending on the depth of the answer being sought and the setup of the chart you are using. Because of this fact, if you are learning this subject in school, and seeking to answer your teacher's / professor's question, then you might want to check your book for a chart first.
To answer your question though, the categories are as follows:
Phaneritic, which means it contains coarse grains / visible crystals. Within the phaneritic category, there is a subcategory which contains larger crystals, called pegmatitic, (but they are still phaneritic too).
Porphyritic, which means it contains a mixture of coarse and fine grains, to put it simply. (To put it less simply, it is fine-grained and contains appreciable phenocrysts.)
Aphanitic, which means it is fine-grained.
Glassy, which looks like glass. (Think of obsidian.)
Vesicular, which contains gas holes, made from gas bubbles. (Think of pumice.) But depending on the chart, this category may or may not fall under glassy, since pumice, for example is actually made of frothy glass. Futhermore, some types of vesicular rocks may be subdivided into a category called frothy.
Pyroclastic, which is made up of fragmented volcanic debris. (However, this category may be divided depending on fragment size. The subcategories are volcanic tuff, (which has fragments under 2 mm in size), and volcanic breccia, (which has fragments over 2 mm in size).
Again, the answers sought can depend on the depth of knowledge being sought. For example, if you are seeking this answer for a school assignment, your teacher or professor might only be seeking phaneritic, aphanitic, porphyritic, glassy, and pyroclastic. However, they may want to see the subcategories of pegmatitic, frothy, vesicular, volcanic tuff and volcanic breccia. The answers can be more in depth too, but I hope this is enough to help you. Again, I recommend looking at any handouts or your book, if you are a student, in order to ascertain just what depth of knowledge your teacher / professor expects you to have.
What else can I help you with?
When mineral grains in a metamorphic rock do not form layers the rock has what texture?
no texture
What texture does and extrusive igneous rock have?
fined grain texture
What is the texture of Travertine rock?
it is fine-grained
What type of igneous rock has a coarse-grained texture?
pegmaitie
What type of metamorphic rock has a random grain texture?
Because of the gravity ..
What is the word that describes the shapes and sizes of the grains in a rock?
The word that describes the shapes and sizes of grains in a rock is "texture." Texture refers to the arrangement and size of mineral grains in a rock, whether they are fine-grained, coarse-grained, or other specific characteristics.
What food can be discribed as soft and semi hard and hard?
Rock hard meat between boys legs :)
When mineral grains in a metamorphic rock do not form layers the rock has what texture?
no texture
What type of texture does an organic sedimentary rock have?
well it depends. if its agray rock, it has a gray texture. if its a gold rock, it has a high value texture. etc
What size of rock texture refers to igneous rock?
The size of the mineral crystals in an igneous rock determines the rock's texture.
What is the texture of the rock andesite?
The texture of Andesite rock is fine-grained and it Extrusive plus it is an igneous rock .
What do you call the way a rock or mineral feels?
The way a rock or mineral feels is known as its texture. Texture describes the physical characteristics such as smoothness, roughness, or graininess of a rock or mineral when touched.
What is the relationship between igneous rock's texture and where it is formed?
The relationship between an igneous rock's texture and where it was formed is that the texture depends on whether or not the rock is an extrusive rock or an intrusive rock. Those two different types of classifications for rocks tell you what the texture will be. For example, Intrusive rocks have a coarse-grained texture like granite and extrusive rocks have a fine-grained texture like basalt.
What is the relationship between an igneous rock's texture and where it was formed?
The relationship between an igneous rock's texture and where it was formed is that the texture depends on whether or not the rock is an extrusive rock or an intrusive rock. Those two different types of classifications for rocks tell you what the texture will be. For example, Intrusive rocks have a coarse-grained texture like granite and extrusive rocks have a fine-grained texture like basalt.
What do you call the way a rock feels?
The way a rock feels is referred to as its texture. Texture can vary from smooth to rough, depending on factors like the composition and history of the rock.
What determines the texture of a rock?
The texture is determined by the rate it takes the molten to cool to form the rock.
What is rock texture?
Texture refers to the size and orientation of the mineral crystals or clasts contained within the rock.
