Igneous Rocks Form By

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Think about the last time you left a pot of soup on the stove too long. The bottom got crusty, the sides bubbled, and you ended up with a dark, brittle mess. That’s basically how basalt forms—except with more lava and less emergency cleanup.

Now imagine that crusty soup layer being shoved under extreme pressure for millions of years. That’s how you get obsidian, a rock so smooth and sharp that ancient people used it for arrowheads. I once tried to cut a pizza with an obsidian flake—do not recommend, but it works better than a butter knife.

The Texture of Igneous rocks

Scenes from Everyday Rock Life

Remember that time you poured hot wax on a birthday candle? It cooled into a glossy, bumpy blob. That’s extrusive rock in action—just with more heat and less sparkle.

Or when you melted a chocolate bar in the car on a summer day? That gooey mess hardening into a lumpy, uneven shape? That’s how scoria forms—bubbly and rough, like chocolate with too many air pockets. You don’t eat it, though. Trust me on that one.