All Subjects
      All Types

        Info

        Grades

        6-12

        Accessibility

        Caption

        Permitted Use

        Stream, Download and Share


        Part of NOVA
        26 Favorites
        4547 Views

        Making North America | Granite vs. Basalt Formation

        Examine the origins and characteristics of two types of rock—basalt and granite—that cover the ocean floor and much of the land surface of Earth, in this video from NOVA: Making North America: Origins. While early Earth’s undersea surface was made entirely of dark, heavy volcanic rock called basalt, over time, a lighter kind of rock formed. This rock, called granite, was buoyant. It floated up from the ocean floor and gathered in thick layers, creating landmasses that we call continents. This resource is part of the NOVA: Making North America Collection.

        Visit the program page here.

        Contributor:
        Funder:
        Funder:
        Funder:
        Funder:
        Funder:
        Producer:

        You must be logged in to use this feature

        Need an account?
        Register Now