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Question: marie tharp was important to the development of plate tectonic...

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Marie Tharp was important to the development of plate tectonic theory because:

She realized that fossil evidence suggested that the continents had been in different positions in the past
She invented sonar during WW2 for mapping the ocean floor
She made intricate maps of the ocean floor that revealed the mid-ocean ridge system, among other features
She suggested the idea of sea-floor spreading
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