File:Hornblende gabbro (Salem Neck, Massachusetts, USA) 1.jpg
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| Description |
English: Gabbro is a mafic, phaneritic, intrusive igneous rock composed principally of plagioclase feldspar and pyroxene. The dominant mafic mineral component of the sample seen here is not pyroxene, however - it's amphibole (hornblende). Sometimes the term "bojite" is used to refer to amphibole-bearing gabbros, but "hornblende gabbro" seems to be preferrable in modern times.
Geologic unit: unrecorded/undisclosed (but possibly derived from the Salem Gabbro-Diorite (a.k.a. Salem Diorite-Gabbro), Middle Ordovician, 460 Ma) Locality: unrecorded locality at Salem Neck, southern Essex County, northeastern Massachusetts, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/51631344702/ |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/51631344702. It was reviewed on 19 June 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 08:27, 19 June 2022 | | 2,353 × 2,526 (4.88 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51631344702/ with UploadWizard |
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