File:Delicatus Ice Granite (pegmatitic granite) 4 (34808568903).jpg
Original file (4,752 × 5,152 pixels, file size: 8.93 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionDelicatus Ice Granite (pegmatitic granite) 4 (34808568903).jpg |
"Delicatus Ice Granite" - pegmatitic granite attributed to Brazil. Igneous rocks form by the cooling & crystallization of hot, molten rock (magma & lava). If this happens at or near the land surface, or on the seafloor, they are extrusive igneous rocks. If this happens deep underground, they are intrusive igneous rocks. Most igneous rocks have a crystalline texture, but some are clastic, vesicular, frothy, or glassy. Granite is an very common intrusive igneous rock. Garden-variety granites are composed of quartz, potassium feldspar (K-feldspar), sodic plagioclase feldspar, hornblende amphibole, and mica. Granites have a felsic chemistry. Felsic igneous rocks are generally light-colored, have >65% silica (“silica” = SiO2 chemistry) (felsic has also been defined as >70% silica), are rich in potassium (K) & sodium (Na), and are dominated by the minerals quartz and K-feldspar. The cut-and-polished granite specimen shown above has a pegmatitic texture (many granites have a phaneritic texture, with crystals between 1 mm and 1 cm in size each). All or almost all of the crystals in a pegmatitic rock are >1 cm in size each. Pegmatitic granite usually forms by cooling of a relatively water-rich magma. Very slow cooling of magma can also result in a pegmatitic texture. Three principal minerals are present in this sample. The medium gray glassy material is quartz (SiO2 - silica/silicon dioxide). The whitish to whitish-gray material is potassium feldspar (KAlSi3O8 - potassium aluminosilicate). The thin black areas are biotite mica (K(Mg,Fe)3(AlSi3O10)(OH)2 - potassium magnesium iron hydroxy-aluminosilicate). The small, scattered red spots are garnet (click on the photo to zoom in & look around). |
Date | |
Source | Delicatus Ice Granite (pegmatitic granite) 4 |
Author | James St. John |
Licensing
[edit]- 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@N05/34808568903 (archive). It was reviewed on 12 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
12 November 2019
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 04:16, 12 November 2019 | 4,752 × 5,152 (8.93 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | A08447065B870046 |
---|---|
Camera model | Handy Scanner |
ISO speed rating | 902 |
Width | 4,752 px |
Height | 5,152 px |
Bits per component |
|
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 600 dpi |
Vertical resolution | 600 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 16:23, 29 June 2017 |
Exif version | 2.2 |
Color space | sRGB |
Date and time of digitizing | 15:04, 1 January 2015 |
Date metadata was last modified | 12:23, 29 June 2017 |
Unique ID of original document | B6CA767D8D7F9CACDC89AD5039630AD3 |
IIM version | 1 |