File:Gold-Crystalline placer gold (skeletal octahedral crystal; hopper octahedral crystal) (5.5 mm across) from the Santa Elena Placer Gold District of Venezuela. (8284270259).jpg
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[edit]DescriptionGold-Crystalline placer gold (skeletal octahedral crystal; hopper octahedral crystal) (5.5 mm across) from the Santa Elena Placer Gold District of Venezuela. (8284270259).jpg |
Gold nuggets found in rivers & streams (= placer gold) usually have irregular, somewhat rounded shapes. It’s rare to find placer gold having a crystalline structure. Crystalline placer gold (skeletal octahedral crystal; hopper octahedral crystal) (5.5 mm across) from the Santa Elena Placer Gold District of Venezuela. The photo shows the underside of the specimen. It has the typical irregular, dimpled, somewhat rounded shape of many placer gold nuggets. Geologic context: placer gold in modern alluvial deposit; gold is derived from weathering of conglomeratic paleoplacers in the Uairén Formation, Roraima Supergroup, upper Paleoproterozoic, ~1.7-1.8 billion years. Locality: unrecorded locality in the Santa Elena Placer Gold District, near Santa Elena de Uairén, Grand Savannah River region (La Gran Sabana), southeastern Bolivar State, southwestern Guyana Highlands, southeastern Venezuela. |
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Author | James St. John |
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This image, originally posted to Flickr, was reviewed on 2 February 2014 by the administrator or reviewer File Upload Bot (Magnus Manske), who confirmed that it was available on Flickr under the stated license on that date. |
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current | 20:23, 2 February 2014 | 960 × 720 (66 KB) | File Upload Bot (Magnus Manske) (talk | contribs) | Transferred from Flickr by User:PDTillman |
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