All Subjects
      All Types

        Info

        Grades

        6-12

        Accessibility

        Auditory, Visual

        Permitted Use

        Stream Only


        Part of KET
        117 Favorites
        1990 Views

        The Geology of Coal

        In this video, a geologist describes how coal, a sedimentary rock, was formed when organic materials piled up in swamps millions of years ago. Over time, heat and pressure transformed the buried materials into peat and into various forms of coal. The geologist shows samples of low- and high-sulfur coal. High-sulfur coal contains a lot of pyrite, which is a mixture of sulfur, iron, and traces of other minerals. As long as it is underground, this mixture causes no environmental problems. But when it is exposed to air through mining, the pyrite rusts and forms sulfate salts on the coal's surface that can contaminate water.

        This resource is part of the Water Solutions collection.

        This video is available in both English and Spanish audio, along with corresponding closed captions.

        Download video here: http://tdcms.ket.org/watersolutions/downloads/watsol00011.zip

        Producer:

        You must be logged in to use this feature

        Need an account?
        Register Now