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Gigapans

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  1. Carbonate mudstone with calcitic dropstone from the lower member of the Ghaub Formation in Namibia. This rock records the onset of Marinoan glaciation, represented by dropstones in the Ghaub Formation. This sample is from the Snowball Earth Educational Rock Sample Suite, and comes courtesy of Paul Hoffman, Harvard U...

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  2. A fine-grained carbonate laminite from above the Ghuab glacial formation. It is interpreted as a marine cap carbonate suggestive of rapid enviromental change. Sample is 8.4 cm long. This sample is from the Snowball Earth Educational Rock Sample Suite, and comes courtesy of Paul Hoffman, Harvard University; Eugene...

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  3. Fine-grained carbonate laminite from the Rhastoff Formation carbonates overlying Sturtian sediments in Namibia. Sample's longest dimension is 9.7 cm. This sample is from the Snowball Earth Educational Rock Sample Suite, and comes courtesy of Paul Hoffman, Harvard University; Eugene Domack, Hamilton College; and T...

  4. Stratified carbonate mud with debris flow deposits and ice-rafted debris from the upper member of the Ghaub Formation in Namibia. Sample is 9 cm across at its widest point. This sample is from the Snowball Earth Educational Rock Sample Suite, and comes courtesy of Paul Hoffman, Harvard University; Eugene Domack, ...

  5. East Greenland #22 is a finely laminated buff yellow cherty carbonate mudstone (dolostone). This sample was taken from the unit that directly overlies the Storeelv formation glacial deposits. The sharpness of the contact between the Storeelv glacial succession and the overlying cap carbonate implies a rapid transition ...

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