When oceanic crust smashes into continental crust, it acts like a bully. It subducts, or dives under, because it’s heavier. This creates volcanoes, earthquakes, and the occasional tsunami that ruins your beach day.
But when two continental crusts collide—like India smashing into Asia—they don’t sink. They crumple, fold, and push up the Himalayas. That’s right: the tallest mountains on Earth are just crusts throwing a tantrum.
PPT - Oceanic and Continental Crust PowerPoint Presentation, free
Surprising fact: Mount Everest is made of ancient seafloor rocks that were once oceanic crust. So, the highest point on Earth started as the bottom of the ocean. Talk about a career change.
What’s Underneath? (Spoiler: It’s Hot)
Both crusts sit on the mantle, a layer of semi-molten rock that’s about 2,900 kilometers thick. It’s like a slow, churning lava lamp that moves tectonic plates.
Oceanic crust forms at mid-ocean ridges, where magma bubbles up and cools into new seafloor. Imagine Earth squeezing out a fresh layer of crust like toothpaste—except it’s hot rock and you can’t brush with it.
Continental crust is built mostly by volcanic eruptions and the accretion of older bits of crust gluing together. It’s messy, chaotic, and the result of billions of years of “let’s just pile it on.”
