plate

mason boldt

Continental Drift

https://docs.google.com/a/cbcsd.org/presentation/d/1YXCjcEi_LRUkmLncoRO0XklgDqOikc0nWtPRBKlfLLQ/edit I think it is valid because it did look like they fit together at one time.



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Seafloor spreading

https://docs.google.com/a/cbcsd.org/presentation/d/1kqvldxUfb7AfSVpHs-P-IhnLa-oDNu6S99LqB1O2Wxw/edit I think it's valid because the old rocks are by the shore, and the new ones are in the middle of the ocean

plate techonics

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