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What else can I help you with?
Name 4 kinds of igneous rocks?
Examples of igneous rocks are pumice, obsidian, basalt, and rhyolite.
What does obsidian mean in rocks and minerals?
Obsidian is black glass formed by volcanoes.
Why do obsidian rocks look dark?
because an obsidian rock has low silica
What type of rocks are pumice obsidian and granite?
Igneous rocks
What are rocks that have a glassy texture called?
Obsidian
Why does vinegar cause sedimentary rocks to fizzle?
Vinegar, which is acidic, reacts with the calcite or limestone present in sedimentary rocks, resulting in the release of carbon dioxide gas. The fizzing or bubbling you observe is the visible evidence of this reaction. This reaction between the acid and the calcium carbonate in the rock is similar to the reaction that occurs when acid is added to baking soda.
What is a glassy rock?
Glassy rocks are rocks that have cooled and solidified quickly, without forming crystals. This rapid cooling prevents mineral crystals from growing, resulting in a smooth and glass-like texture. Obsidian and pumice are examples of glassy rocks.
What are very smooth rocks called?
Very smooth rocks are called "polished rocks" or "river rocks" due to the smooth texture achieved from erosion in water bodies like rivers and oceans.
How long have obsidian rocks been around?
A while.
Is the obsidian trilogy good?
oh it rocks! You have to read it
What is it called when igneous rocks cool quickly?
obsidian
What is a name for volcanic glass?
One word for this is obsidian. Obsidian is a gorgeous hard stone, usually but not always black, and sometimes with iridescent, almost opalescent highlights. Tachylite is also a volcanic glass of basaltic composition.
