( Earth Rocks !
2017 youTUBE video    11:39 )

Plate Tectonics Basics

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( Earth Rocks !
2016 youTUBE video    10:50 )

Plate Tectonics Global Impacts

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( Earth Rocks !
2015 youTUBE video    8:20 )

Plate Tectonics and California Geology

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( Earth Rocks !
2014 youTUBE video    20:16 )

Identifying Igneous Rocks -- Earth Rocks!

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( Earth Rocks !
2014 youTUBE video    14:17 )

Identifying Metamorphic Rocks -- Earth Rocks!

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( Earth Rocks !
2014 youTUBE video    15:00 )

Identifying Sedimentary Rocks -- Earth Rocks!

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( Earth Rocks !
youTUBE video    : )



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( Earth Rocks !
youTUBE video    : )




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