Rocks Minerals : Identifying Types of Rocks

The three types of rocks are igneous, formed from molten rock, sedimentary, formed from the elements of an existing rock, and metamorphic, formed by a change in heat or pressure.‎ Identify the three different types of rocks with information from a geology professor in this free video on rocks.‎ Expert: Jeffrey K.‎ Wagner Bio: Jeffrey K.‎ Wagner is an associate professor of astronomy and geology.‎ He has been a faculty member of Bowling Green State University Firelands since 1981.‎ Filmmaker: Bradley Walton

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