Describe the evidence and conclusions drawn from marine cores for determining the first start of Quaternary continental glaciation.

Imagine you are a top level administrator at NOAA and have to explain to a skeptical congressional committee how important the acquisition and analysis of marine sediment cores has been in understanding long-term climate change.

For your argument to the committee, describe the evidence and conclusions drawn from marine cores for determining the first start of Quaternary continental glaciation, and the timing and causes of the subsequent Pleistocene ice ages.

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