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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.

  3. Cruziana trace fossils, donated by Alan Pitts.

  4. Liesegang rings from the unit above the Dwyka tillite in Namibia. This sample was provided by Dr. Jay Kaufman of the University of Maryland.

  5. Writes Dr. Jay Kaufman of University of Maryland, who contributed this sample: "I had been told that there was pyrobitumen (crystallized oil) as a replacement for ooids in some levels of the Turkut Formation in the Olenek Uplift of arctic Siberia. In the field, I found an abundance of different breccias within the T...

  7. Sand from Scientists' Cliffs, Maryland. For more information on Scientists' Cliffs, including several gigapans of outcrops there, click here: blogs.agu.org/mountainbeltway/2013/03/05/documenting-doomed-outcrops-scientists-cliffs-maryland Will open in a new tab or window/

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  8. Sand from the north end of Ocean Beach in San Francisco, CA.

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  9. Ocean Beach in San Francisco showcases some of the jumbled mess that is the Franciscan Complex. Here you can see graywacke abutting tafoni-weathered sandstone. Behind this wall is a small sea cave in which, until storms deposited about four feet of sediment in two years, the contact between the graywacke and underlying...

  10. The Swift Run Formation is a Neoproterozoic metasedimentary rock unit in Virginia's western Blue Ridge province. It unconformably overlies the Blue Ridge basement complex, and is overlain by the Catoctin Formation.

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