Most volcanoes form at the boundaries of Earth's tectonic plates, which are huge slabs of crust and upper mantle that fit together like puzzle pieces. Think of these plates as massive rafts floating ...

When you walk around on land, you are walking on top of Earth’s rocky crust. Below the crust is another thick layer of rock. These layers form Earth’s tectonic plates, and when those plates collide ...

Geology and geochemistry PhD student researching rocks, how volcanoes form, and how continental crust is made on planets other than Earth Benjamin Gruber is a fourth-year PhD student studying geology ...