0
When samples of magma are cooled quickly they do not have time to develop any crystal structure. The liquid sample will turn into a glassy solid. Under natural conditions this rapid cooling would result in a material known as obsidian. This is a black to brownish material that has all the characteristics of glass; conchoidal fracture, hardness, light transmission in thin edges, etc. depending on the type of magma.
Obsidian, even though seemingly a solid, is called a super-cooled liquid, just like window glass. There is no crystal structure at first but over a long period of time crystals will start to grow within the obsidian. This is known as "snowflake obsidian" because the crystals are suspended like flakes in ice. It has been said that there is no obsidian older than 10,000 years as it has all crystallized in that time.
What else can I help you with?
What texture does magma in two cooling stages first slowly then quickly?
very coarse
What will form when magma cools?
When magma cools, it can solidify into different types of igneous rock depending on the cooling rate. Slow cooling can form coarse-grained rocks like granite, while rapid cooling can form fine-grained rocks like basalt. If the magma cools very quickly at the Earth's surface, it can solidify into volcanic glass like obsidian.
Magma that cools slowly forms what kind of rock?
Intrusive igneous rocks are formed by slow cooling magma below the earth's surface. Extrusive igneous rock is formed by magma cooling quickly, at or near the surface.
Do Glassy igneous rocks form when magma cools so slowly that mineral crystals cannot grow?
No, glassy igneous rocks form when magma cools so quickly that mineral crystals do not have time to form. This rapid cooling prevents the atoms in the magma from arranging themselves into a crystalline structure, resulting in an amorphous, glassy texture.
Is komatiite intrusive or extrusive?
Komatiite is an extrusive igneous rock that forms from very hot magma erupting onto the surface of the Earth and cooling quickly. It is characterized by its high magnesium content and typically forms where there are high mantle temperatures.
What texture does magma in two cooling stages first slowly then quickly?
very coarse
What will form when magma cools?
When magma cools, it can solidify into different types of igneous rock depending on the cooling rate. Slow cooling can form coarse-grained rocks like granite, while rapid cooling can form fine-grained rocks like basalt. If the magma cools very quickly at the Earth's surface, it can solidify into volcanic glass like obsidian.
Where would the cooling process most likely be very slow for magma?
Very deep underground.
Magma that cools slowly forms what kind of rock?
Intrusive igneous rocks are formed by slow cooling magma below the earth's surface. Extrusive igneous rock is formed by magma cooling quickly, at or near the surface.
What is the origin of obsiadan?
If you are asking about how they were formed magma from volcano that are shot in the air of quickly spewed out causing the magma to cool very quickly forming a very smooth surface on obsidian. Becuase the magma cooled so fast it couldn't slowly cool into a rough textured rock.
What is the name given to the volcanic glass that forms due to very rapid cooling of magma?
Yes obsidian is glassy because it cooled very fast.
Rapidly cooling lava or magma forms very small 'blank'?
It forms very small crystals, not visible without magnification.
How is an igneous rock's texture determined by the rate of cooling of magma?
yes, slowly cooling magma will crystallize (granite). If it cools quickly, the lava will have very small crystals and will contain air pockets (pumice, if it is cooled in chunks) or can even be very thin, like hair, very straight. (Pele's hair)
What is the simplified pattern that illustrates the order in which minerals crystallize from cooling magma?
when magma cools fast you get smaller crystals when it cools slow you get large crystals its very simple
Do Glassy igneous rocks form when magma cools so slowly that mineral crystals cannot grow?
No, glassy igneous rocks form when magma cools so quickly that mineral crystals do not have time to form. This rapid cooling prevents the atoms in the magma from arranging themselves into a crystalline structure, resulting in an amorphous, glassy texture.
Is komatiite intrusive or extrusive?
Komatiite is an extrusive igneous rock that forms from very hot magma erupting onto the surface of the Earth and cooling quickly. It is characterized by its high magnesium content and typically forms where there are high mantle temperatures.
Volcanic glass forms when magma cools very quickly?
Yes obsidian is glassy because it cooled very fast.
