Tag Archives: Geophysics FactsHouse And Home

Fold Facts

Rocks usually form in flat layers called strata. Tectonic plates can collide (see converging plates) with such force that they crumple up these strata. Sometimes the folds are just tiny wrinkles a few centimeters long. Sometimes they are gigantic, with hundreds of kilometers between crests (the highest points on a fold). The shape of a…
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Continental Crust Facts

The Earth’s crust is its hard outer shell. The crust is a thin layer of rock that floats on the mantle. It is made mainly of silicate minerals (minerals made of silicon and oxygen) such as quartz. There are two kinds of crust: oceanic and continental. Oceanic crust is the crust beneath the oceans. It…
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Converging Plate Facts

In many places around the world, the tectonic plates that make up the Earth’s crust, or outer layer, are slowly crunching together with enormous force. The Atlantic is getting wider, pushing the Americas further west. Yet the Earth is not getting any bigger because as the American plates crash into the Pacific plates, the thinner,…
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