Question: What two types of crust make up the surface of the earth?

context: Most terrestrial planets have fairly uniform crusts. Earth, however, has two distinct types: continental crust and oceanic crust. These two types have different chemical compositions and physical properties, and were formed by different geological processes.
question: What type of crust composed of primarily mafic rocks makes up the surface of the earth?
short_answers: oceanic
context: No context provided
question: What type of crust composed of primarily more felsic rocks makes up the surface of the earth?
short_answers: continental

Answer: Earth has two types of crust, continental and oceanic, which have different chemical compositions and physical properties and were formed by different geological processes. Continental crust is the layer of rocks that forms the continents and continental shelves. It's mostly composed of more felsic rocks, igneous rocks relatively rich in elements that form feldspar and quartz, such as granite. Oceanic crust is primarily more mafic rocks, igneous rocks rich in magnesium and iron, such as basalt, diabase, and gabbro.