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Gigapans

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  1. Stromatolites in driveway, Thunder Bay Ontario

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  2. A phosphatic (up to 16 wt. %) columnar stromatolite from the ca. 740 Ma Salitre Formation of the Una Group in central Brazil. These stromatolites are similar to those found in post-glacial cap carbonate lithofacies. This sample was provided by Dr. Jay Kaufman of the University of Maryland.

  3. The sample is a tubestone stromatolite of the Neoproterozoic Noonday Formation, a post-glacial cap carbonate, from the Queen of Sheba mine in Death Valley. Notably, the inner tube, which appears here as the more resistant portion of the rock and likely rich in silica, co-exists with galena and other sulfide minerals, ...

  4. Lake Untersee, November 2008. Dr. Valery Galchenko of the Winogradsky Institute of Microbiology, Russian Academy of Sciences, Russia is seen walking across the lake back to our camp. Lake Untersee is one of the largest (11.4 km2) and deepest (>160 m) freshwater lakes in East Antarctica. Located at 71•S, the la...

    • 239295-210x140

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