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Is obsidian extrusive rock?
No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.
A rock that forms from cooling lava is classified as an?
An extrusive igneous rock.
What kind of rock is tuff?
Tuff is considered an extrusive igneous rock.
Is granite rock a extrusive rock?
No, granite is the most common intrusive igneous rock.
What is category of igneous extrusive rock?
Some igneous extrusive rocks include obsidian, basalt, andesite, rhyolite, scoria, pumice, basaltic glass. If you want more, go to page 6 on the Earth Science Reference Tables at the related link.
What is a light frothy extrusive rock formed when lava cools so fast that it traps pocket or air inside?
Pumice rock.
What light frothy extrusive rock is formed when lava cools so fast that it trap pockets of air inside?
Pumice is a light, frothy extrusive rock formed when lava cools rapidly, trapping pockets of air inside. Its porous nature allows it to float on water and makes it useful in products like exfoliating scrubs and insulation materials.
What are the characteristics extrusive igneous rocks?
In addition to having small crystals, an extrusive igneous rock can: Be glassy or frothy in appearance. Be felsic, intermediate, mafic, or ultramafic in nature. Be porous or full of bubbles. Be light enough to float (pumice).
What is a rock formed from lava that cooled quickly and entrapped air and other gases and is similar to scoria?
The rock described is likely pumice. Pumice is a light-colored, frothy volcanic rock that forms when lava cools quickly, trapping air bubbles and gases. It is commonly used in horticulture and beauty products for its abrasive properties.
What does pumice mean for rocks and minerals?
Pumice is an extrusive igneous rock which forms when the lava is very frothy from a lot of gas exsoliving out of the lava, it is sort of like an extrime vesicular rock.
Are river rocks porous?
No. It is a fine grained extrusive volcanic rock that is light in color. It is usually not porous.
Is Obsidian an extrusive rock or intrusive rock?
Yes it is extrusive love yall
What are Frothy volcanic rock are called?
Frothy volcanic rocks are called pumice. Pumice forms when lava with high gas content erupts from a volcano and cools rapidly, trapping gas bubbles within the rock, giving it a lightweight and porous appearance.
What is a naturally occurring igneous rock more correctly called obsidian?
Obsidian is also called volcanic glass, an extrusive, largely non-crystalline, felsic igneous rock. Pumice is also a frothy form of obsidian.
Is pumice an extrusive rock?
Extrusive
Are basalt extrusive or intrusive?
Basaltic rock are true to be extrusive rock
What is a light glassy rock formed from frothy lava?
Pumice is a light and glassy rock formed from frothy lava that has cooled rapidly, trapping gas bubbles in the process. It is commonly used in abrasives, as a soil amendment, and in cosmetics due to its abrasive and exfoliating properties.
