Minerals
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pegmatite in Proterozoic Red Bluff Granite complex
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- 34
- Explore Score
- 50
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Red Bluff Granite in detail.
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- 21
- Explore Score
- 50
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Sulfuric acid altered rock. Groundwater leaching through cracks is precipitating melanerite (white iron sulfate) on the outcrop face.
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- 38
- Explore Score
- 51
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Garnet porphyroblasts may be seen in the metamorphosed Castner Marble exposed in the eastern Franklin Mountains north of El Paso, Texas.
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- 35
- Explore Score
- 42
- Klingle Valley metaconglomerate, Laurel Formation, Rock Creek Shear Zone, Washington, DC by Callan Bentley
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Strained metaconglomerate that crops out in a stream in Klingle Valley, DC. Note the prominent granite intrusion. Compare with this annotated view: gigapan.com/gigapans/128969 Or view them both simultaneously in the comparative viewer from GIGAmacro.com: www.gigamacro.com/gigamacro_viewer/gigama
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- 212
- Explore Score
- 33
- Klingle Valley metaconglomerate, Laurel Formation, Rock Creek Shear Zone, Washington, DC by Callan Bentley
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Strained metaconglomerate that crops out in a stream in Klingle Valley, DC. Retrograde metamorphism is apparent, with sericite-after-starulote pseudomorphs.
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- 112
- Explore Score
- 35
- Klingle Valley metaconglomerate, Laurel Formation, Rock Creek Shear Zone, Washington, DC by Callan Bentley
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Strained metaconglomerate that crops out in a stream in Klingle Valley, DC.
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- 94
- Explore Score
- 28
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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.
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- 159
- Explore Score
- 28
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- 268
- Explore Score
- 39
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Native copper in Catoctin Formation metabasalt from the Virgin Mine in Pine Mountain, PA.
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- 324
- Explore Score
- 21

