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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. Banded iron formation with ice-rafted debris. This deep ocean stratigraphic equivalent of Ghaub diamictites indicates highly anoxic oceanic chemistry. The grey is hematite, the red is jasper, and the buff is siderite. The sample is from the Mackenzie Mountains in northwest Canada. Banded iron deposition requires tha...

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  3. Jay Kaufman of the University of Maryland - College Park loaned us this sample to image. It is a piece of the Ghaub Formation of Namibia, carbonate diamictite with iceberg-rafted debris attributed to the Neoproterozoic "Snowball Earth" glaciation. A prominent dropstone is located in the middle of this face. Sampl...

  4. Stratified carbonate diacmictite with sediment gravity flow and ice-rafted debris. Sample is 15 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, Hamilton College; and Timothy Fox, Hamilton Co...

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  5. Stratified carbonate mud diamictite with sediment gravity (debris flow) deposits and ice-rafted debris from the upper member of the Ghaub Formation in Namibia. Sample is 14 cm across at its widest point. This sample is from the Snowball Earth Educational Rock Sample Suite, and comes courtesy of Paul Hoffman, Harv...

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      1
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      300
      Explore Score
      6

  6. 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, ...