File:Magnesite vein in serpentinite (Paleozoic; J.A. Vermont Verde Antique International Quarry, Windsor County, Vermont, USA).jpg
Original file (936 × 603 pixels, file size: 423 KB, MIME type: image/jpeg)
Captions
Captions
Summary[edit]
.jpg&action=edit§ion=1){kind=link}
| Description |
English: Magnesite vein in serpentinite from the Paleozoic of Vermont, USA. (4.7 cm across at its widest)
White = magnesite Dark greenish = serpentinite host rock A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 5100 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates. The carbonate minerals all contain one or more carbonate (CO3-2) anions. Magnesite is a magnesium carbonate mineral (MgCO3). It forms a chemical spectrum with dolomite (CaMg(CO3)2) and calcite (CaCO3). It often forms coarsely-crystalline masses or chalky/earthy masses. It has a nonmetallic luster and can be any color, but is often whitish. It has a white streak, a hardness of about 3.5 to 4.5, and rhombohedral cleavage (= same cleavage as calcite). Magnesite is usually the result of metamorphic chemical alteration of Mg-bearing rocks such as peridotites and serpentinites by the action of carbonic acid-rich fluids. The whitish-colored magnesite vein shown above is derived from alteration of the host serpentinite rock by carbonate ion-bearing fluids. The serpentinite is metamorphosed oceanic lithospheric dunite hosted in schists and quartzites of the Ottauquechee Formation (Lower Cambrian). Metamorphism of the original mantle dunite rock occurred during the Taconic Orogeny and Acadian Orogeny (Early & Middle Paleozoic). Locality: J.A. Vermont Verde Antique International Quarry, eastern side of Quarry Hill Road, northeast of Rochester, northwestern Windsor County, central Vermont, USA (43° 54' 55" North latitude, 72° 48' 26" West longitude) Photo gallery of magnesite: www.mindat.org/gallery.php?min=2482 |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/32165686916/ |
| Author | James St. John |
Licensing[edit]
.jpg&action=edit§ion=2){kind=link}
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
|
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/32165686916. It was reviewed on 12 March 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:09, 12 March 2020 | | 936 × 603 (423 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/32165686916/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
.jpg&oldid=825515017){kind=link}