1. Skip to navigation
  2. Skip to content
  3. Skip to sidebar

Gigapans

NEW! Print your gigapan now!
Go to page:

  1. 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...

    • Stats

      Favorites
      1
      Comments
      Snapshots
      Total Views
      299
      Explore Score
      6

  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...

    • Stats

      Favorites
      1
      Comments
      Snapshots
      Total Views
      255
      Explore Score
      1

  3. 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...

    • Stats

      Favorites
      1
      Comments
      Snapshots
      Total Views
      252
      Explore Score
      1

  4. Pseudomorphosed aragonite crystal fans in calcimicrite from the Hayhook Formation. PFH-3 is an aragonite crystal fan from the Mackenzie Mountains in northwest Canada. The aragonite has been partially replaced by dolomite and calcite minerals. The sample records several intervals of fan growth and truncation, and is ...

    • Stats

      Favorites
      1
      Comments
      Snapshots
      Total Views
      227
      Explore Score
      1

  5. 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...

    • Stats

      Favorites
      1
      Comments
      Snapshots
      Total Views
      211
      Explore Score
      1

  6. From the Amogjar cap dolostone in West Africa. This barite fan records barium sulfate remobilization that occurred during a rapid shift in oceanic chemical conditions. Barium sulfate is insoluble in oxygenated water, but under anoxic conditions it will dissolve in the manner seen here. PFH-1 records unusual oceanic ...

    • Stats

      Favorites
      0
      Comments
      Snapshots
      Total Views
      192
      Explore Score
      1

  7. 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...

    • Stats

      Favorites
      0
      Comments
      Snapshots
      Total Views
      187
      Explore Score
      1

  8. Cross-laminated sandstone composed primarily of well-rounded, coarse sand grains from the base of the Ulveso Formation. The Ulveso Formation has been interpreted as an immature aeolian deposit with a proglacial subaerial origin. This sample may have been deposited during a period of dry, windy conditions preceding the ...

  9. 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...

  10. 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, ...

Go to page: