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Is obsidian an instrusive or extrusive igneous rock how do you know?
Obsidian is an extrusive rock and is formed from rapidly cooling magma. Obsidian is also known as volcanic glass and one can find only sub-microscopic crystals in it. This is because it was cooled too fastly for large crystals to form. If the material that obsidian consists of were an intrusive rock and had a lot of time to cool down, one would find that it would be composed of easily visible crystals.
A lava flow is an example of an igneous rock one of the two main igneous rock groups?
It is an example of extrusive igneous rock.
Which of the six major kinds of rock are intrusive and which are extrusive?
Intrusive rocks are formed beneath the Earth's surface and include granite, diorite, and gabbro. Extrusive rocks, on the other hand, are formed on the Earth's surface and include basalt, andesite, and rhyolite.
Is pumice an extrusive or an intrusive rock?
Pumice is Extrusive after it has been envelop from the volcanoes eruption! it can somehow be a intrusive but very "rare". It is however very light and bumpy felling!
From what material does an extrusive rock form?
Extrusive rocks form from lava that cools and solidifies quickly on the Earth's surface, such as basalt or rhyolite.
Is diabase a instrusive or extrusive type of igneous rock?
It's Both.
Which kind of of igneous has more crystals extrusive or intrusive?
instrusive Rock
What is the difference between an intrusive igneous rock and an extrusive rock?
instrusive is inside the valcano and exstrusive comes onto earth's crust
Two kinds of igneous rock?
Extrusive-formed on surfaceIntrusive-formed underground
What is the difference between an extrusive rock igneous rock and intrusive rock?
instrusive is inside the valcano and exstrusive comes onto earth's crust
What is the difference between instrusive rocks and extrusive rocks?
Extrusive rocks form above the surface, cooling quickly and bearing a glassy or fine texture and may be vesicular. Intrusive rocks form below the surface and form slowly, giving it a coarse texture.
What type of rocks form from lava after a volcanic eruption?
Igneous rocks are formed from the cooling and solidifying of magma. The resulting rock can be instrusive (magma cooling within the crust) and extrusive (lava cooling on the surface). The most common kind of rocks are Granite (intrusive) and Basalt (extrusive).
What three elements are likely to be found in a sample of soil and rocks?
soil- Clayey soil, sandy soil, and loamy soil rock-metamorphic rock, instrusive/extrusive rock, sediments
What is the best clue to tell in extrusive igneous rocks from in instrusive igneous rock?
Extrusive igneous rocks have smaller crystals due to rapid cooling on the Earth's surface, while intrusive igneous rocks have larger crystals due to slower cooling beneath the Earth's surface. This difference in crystal size can help distinguish between the two types of rocks.
What are types of igneous rock?
There are two main types of igneous rocks: intrusive (plutonic) rocks form beneath the Earth's surface from cooling magma, such as granite and diorite; extrusive (volcanic) rocks form from lava cooling on the Earth's surface, such as basalt and rhyolite.
What type of rocks includes intrusive and extrusive kinds of rocks?
Igneous.
What kinds of rock are formed by volcanoes?
Extrusive igneous rocks are formed from the solidification of magma above ground.
