Batholith

I learned that a batholith is a main magma chamber and it ranges from hundreds to thousands of cubic kilometers across km beneath earths surface.

strata vs. shield volcanoes

Shield Volcano is made up of basalt like Hawaii. It's slopes are made by liquid basalt lava that pushes up from a vent under the ground.

More than one kind of magma builds up in Stratovolcanoes. They are basalt, andesite, dacite, and rhyolite magma.

Gulf Current

I learned a current of warm water that keeps Western Europe warm is the Gulf Stream and 71% of the world is covered by Ocean Water.

Plate Tectonics

I learned that ages of ocean crust and the thicknesses of ocean-floor sediment increase with distance from an ocean ridge and the three types of convergent boundaries are oceanic-oceanic, oceanic continental and continental-continental.