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When do glassy rock form?
Glassy rocks form near or in volcanoes, or just under high pressure and heat. For volcanoes, lava will harden on the surface for active volcanoes, and will harden inside the volcano if it's inactive. Under normal circumstances, such as with sedimentary rocks, rocks deep within the earth will become pressurized and flatten, then heat up, creating a glassy rock.
Why is obsidian black?
Well it is a tool/rock made from volcanic glass. The Aztec used it a lot to build statues and shelter. Obsidian is well suited to 'flaking" or "napping" which is the art of creating a sharp edge. Obsidian will flake down to a molecular edge, being a type of naturally occurring glass it is high on the hardness scale. Even today, some surgical scalpel tips are fabricated from obsidian.
What is the closest living relative of the Yellow-footed Rock-wallaby?
The Black-footed Rock wallaby and all other species of rock-wallaby are the closest living relatives of the Yellow-footed Rock wallaby.
Why is the rock hopper penguin called the rock hopper penguin?
The rockhopper penguin is named for its unique way of moving on land by hopping from rock to rock, using its strong legs and webbed feet to navigate rocky, uneven terrain. Its distinctive method of getting around distinguishes it from other penguin species that may walk or waddle on smooth surfaces.
What animals are in the Kimberley Ranges?
The Kimberley ranges are home to a number of marsupial species, including the Black-footed Rock-wallaby, scaly-tailed possum, monjon, yellow-lipped bat, Kimberley mouse and Kimberley rock-rat. Birds include the black grass-wren and white-quilled rock-pigeon, while reptiles include skinks and geckos.
What is the name of a smooth glassy black ingeous rock?
Obsidian
What is a smooth glassy black igneous rock?
The rock you are describing is likely obsidian. Obsidian is a naturally occurring volcanic glass formed during rapid cooling of lava. It is usually black in color and has a smooth, glassy texture.
What texture of obsidian?
Obsidian is an extrusive rock that cooled very rapidly without forming crystals. As a result, obsidian has a smooth, shiny texture of a thick piece of glass.
Which rock is very smooth and has no visible mineral grains?
Glassy textuered rocks, such as Obsidian.
Smooth glassy rock?
Obsidian: Its texture is glassy. Obsidian is extrusive or volcanic, because the instantaneous cooling that produces such rocks is a surface phenomenon. Obsidian is amorphous, so, unlike true rocks, it is not composed of minerals.
What rock is black and glassy and rapidly cooling lava?
obsidian
What rock is black glassy and was formed by rapidly cooling lava?
The answer is pitchstone. it is and igneous rock.
What are the similar characteristic of obsidian rock?
an odsidian rock is black,shiny and kinda glassy.
How can one identify flint rock?
Flint rock can be identified by its smooth texture, glassy appearance, and ability to produce sparks when struck against steel. It is typically dark grey or black in color and can be found in sedimentary rock formations.
What is stronger a metamorphic rock or igneos rock?
igneous
What does flint look like in its natural state?
Flint in its natural state appears as a hard, dense rock with a smooth, glassy texture. It is typically dark grey or black in color and can have a shiny appearance.
What type of rock is tigers eye?
igneos
