Earth's crust

From Conservapedia

The crust is the geological outer layer of the Earth. There are two types of crust: continental and oceanic.

Continental crust is made up of less dense materials than oceanic crust and is generally much thicker (generally 25-75km thick as opposed to oceanic 6km). The thickest crust is found underneath the Himalayan mountain chain where the roots of the mountains extend to around 75km.^[1]

Continental crust is also much older than oceanic. The oldest crust in existence today is found in Australia and has an apparent age of 4.4 billion years^[2]. Many believe the Bible discredits the notion that the Earth is billions of years old.^{[Citation Needed]}