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What Did I See at Vasquez Rock?

What Did I See at Vasquez Rock?. Follow-up to our class trip to Vasquez Rock. Desert Varnish. Surface covered by black deposits called rock varnish Layer consist of thin layer of bacteria, clay minerals, and manganese and iron oxides The Mn oxide (MnO 2 ) makes black color. Stop #1-2.

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Sand grains loosen - PowerPoint PPT Presentation

What Did I See at Vasquez Rock?