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Card 16

Front

when were the sediments from?

Back

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Card 17

Front

when did evidence start to gather to prove wegener's theory?

Back

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Card 18

Front

when did they survey the floor of the atlantic ocean?

Back

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Card 19

Front

what did this reveal?

Back

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Card 20

Front

how wide?

Back

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Card 21

Front

what height?

Back

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Card 22

Front

what was it composed of?

Back

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Card 23

Front

when did they conduct a magnetic survey?

Back

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Card 24

Front

what did this show?

Back

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Card 25

Front

how often does the earths polarity reverse?

Back

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