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What characteristic provides the best evidence that obsidian rock formed in an extructive environment?
The characteristic that provides the best evidence that obsidian rock formed in an extrusive environment is its glassy texture. This texture indicates rapid cooling of molten lava, preventing the formation of large crystals. Additionally, the presence of gas bubbles or vesicles can further suggest that the lava cooled quickly upon exposure to the surface environment.
Which best explains the glassy look of obsidian?
The fact that obsidian IS glass. It is a naturally occurring form of volcanic glass. Different impurities give it different colors, usually black or shades of gray.
What is the characteristics of obsidian?
Obsidian is a type of igneous rock that cools instantly after a volcano explosion. Obsidian forms when lava enters the water directly after the volcano erupts. The water instantly cools the lava leaving the mineral crystals no time grow. obsidian does not have any minerals and is often classed as a mineraliod. Obsidian can be brown, black, or black and white. Obsidian can often be found in the shape of arrow heads because it was used as a primitive arrow. obsidian is still used to make scalpels.
What are the possible textures of an igneous rock?
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.
Astronomy can best be described as an?
It can be described as a type of study involving the outer space.
Which characteristic provides the best evidence that obsidian rock formed in an extrusive environment?
The glassy texture of obsidian is the best evidence that it formed in an extrusive environment. Obsidian is rapidly cooled lava with no time for crystal growth, resulting in a smooth, glass-like texture.
What characteristic provides the best evidence that obsidian rock formed in an extructive environment?
The characteristic that provides the best evidence that obsidian rock formed in an extrusive environment is its glassy texture. This texture indicates rapid cooling of molten lava, preventing the formation of large crystals. Additionally, the presence of gas bubbles or vesicles can further suggest that the lava cooled quickly upon exposure to the surface environment.
Why is the texture of obsidian is best contain few or no minerals grains?
Obsidian cools so quickly the mineral grains do not have time to form.
Which best explains the glassy look of obsidian?
The fact that obsidian IS glass. It is a naturally occurring form of volcanic glass. Different impurities give it different colors, usually black or shades of gray.
How does the texture of gabbro compare to obsidian?
Both are made from volcanic rock. Pumice forms when lava cools very quickly and still has pockets of air trapped inside. This make the rock very lightweight and porous -- it can even float on water! Obsidian also forms when lava is quickly cooled, but it does not have trapped air pockets inside. It looks like glass and is rather brittle, but makes an excellent material for sharp cutting implements.
What is the characteristics of obsidian?
Obsidian is a type of igneous rock that cools instantly after a volcano explosion. Obsidian forms when lava enters the water directly after the volcano erupts. The water instantly cools the lava leaving the mineral crystals no time grow. obsidian does not have any minerals and is often classed as a mineraliod. Obsidian can be brown, black, or black and white. Obsidian can often be found in the shape of arrow heads because it was used as a primitive arrow. obsidian is still used to make scalpels.
Which property best describes a piece of quartz?
It is a hard crystalline compound of silicon and oxygen.
What is Chanson's texture best described as?
Chanson typically has a homophonic texture, with clear melodic lines accompanied by simple chordal accompaniment. The melody is usually sung in a lyrical and expressive style, making it the focal point of the piece.
What is the BEST shield to buy if your defence is lvl 60?
Obsidian shield
Where is the best place to find obsidian chunks on HorseIsle?
Any of the Lava Isles are where you can find obsidian chunks. There is no "best" place. Also, sometimes you can find them in the rock shops if another player has sold them recently.
Organizing is best described as?
Organizing is best described
Orchestration is best described as?
Type your answer here... Orchestration is best described as?
