* Oxygen (O): The most abundant element in both types of crust.
* Silicon (Si): The second most abundant element.
* Aluminum (Al): A significant component, especially in continental crust.
* Iron (Fe): More abundant in oceanic crust.
* Calcium (Ca): Found in both types of crust.
* Sodium (Na): More prevalent in oceanic crust.
* Potassium (K): More prevalent in continental crust.
* Magnesium (Mg): More abundant in oceanic crust.
Key differences:
* Continental Crust: Has a higher proportion of silicon, aluminum, potassium, and sodium. This makes it less dense and thicker than oceanic crust.
* Oceanic Crust: Has a higher proportion of iron, magnesium, and calcium, which makes it denser and thinner than continental crust.
It's important to note that the exact composition of both types of crust can vary depending on their location and geological history.
