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Gigapans

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  1. Calcite displays at least three different crystal habits and two different colors on one small hunk of limestone. Collected in the Keyser Limestone along the Great Allegheny Passage in La Vale, MD.

  2. 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 ...

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  3. This site is in Saratoga's Spa State Park. It is a calcite accumulation below the Orenda sulphur water flow.

  4. This site is in Saratoga's Spa State Park. It is a calcite accumulation below the Orenda sulphur water flow.

  5. This site is in Saratoga's Spa State Park. It is a calcite accumulation below the Orenda sulphur water flow.

  6. Thin section of fine grained talus from a landslip in Glen Dochart, near Crianlarich, Perthshire, Scotland. The diameter of the core shown is 38mm. The thin section is has been photographed under crossed polars. Using the ureolytic bacterium Sporosarcina Pasteurii the loose material has been biocemented by calcite prec...

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  7. Thin section of a 5mm diameter core of quartz sand which has been cemented using the ureolytic bacterium Sporosarcina Pasteurii. Porosity is picked out by blue dyed epoxy. The loose material has been biocemented by calcite precipitation induced by the bacteria during ureolysis. Calcite crystals can be seen as small gra...

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  8. These are Minerals 36-70 for Geo 306

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  9. Alternating layers of calcite and anhydrite with a few gypsum layers interspersed.

    • 50875-210x140

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